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JIN BD

Wrist Trainer Ball Auto-Start Gyroscopic Forearm Exerciser Gyro Ball for Strengthen Arms, Fingers, Bones and Muscles

  • Based on 4,649 reviews
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Availability: In Stock.
Fulfilled by Amazon
Arrives Sunday, Aug 2
Order within 12 hours and 1 minute
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Color: Blue with LED light


Features

  • The product includes: JIN BD wrist ball Blue LED light model, brand card, ball bag, safety rope, instruction manual, gift box
  • Automatic Start:This upgraded version features a built-in pre-tensioner for activationno starter string required. Simply press the inner ball with your thumb and move it in the direction of the arrow to engage the internal spring. The mechanism is simple and eco-friendly. As the wrist rotates, the core spins at high speed, generating centrifugal force. The faster the spin, the greater the resistance, allowing the wrist to experience an effective workout.
  • Suitable for assisting: Long-term use of computers or mobile phones, carpal tunnel syndrome, repetitive stress injuries, etc. are more common. By continuously and indirectly strengthening the muscles and flexibility of the forearm and wrist joints, it can significantly improve muscle strength, flexibility, and promote blood circulation.
  • Suggested Reminder: If this is your first time using the product and you still have questions or difficulties after watching the built-in instructional video, please contact customer service promptly. Our support team will assist you in real time and provide the necessary help and support.
  • Sports Assistance: It is beneficial for grip training, fitness, golf, tennis, rock climbing, cycling, cricket, martial arts, etc. It has an auxiliary effect on improving finger grip and grip strength.
  • Exquisite Design: The Powerball can be carried anywhere, whether in the office, gym or at home, it can be used as a toy to relieve stress at any time, and it can also exercise finger grip strength training.
  • A chic gift: The gyro ball is a great gift for children who love sports, restless middle-aged people and people who work in the office for a long time, guitarists, pianists and other musicians
  • Quality Assurance: JIN BD Torsion Ball is rigorously tested by factory machines, warehouse inspections, and manual re-inspections. This product does not require battery power. Wrist rotation interacts with the internal ball core to generate centrifugal force to maintain efficient rotation. The faster the rotation speed, the greater the force generated.
  • Tips: If the wrist strength ball you received cannot start smoothly or work properly, please contact us in time, we will help you solve the problem and teach you how to use it correctly.

Description

Benefits of wrist ball 1. Wrist balls are great for warming up your hands, wrists, shoulders, forearms, biceps, and upper limbs. 2. If you spend a lot of time using the computer or playing the piano, you can play this ball for a few minutes every day, which will make your hands feel less painful. 3. Wrist player grip enhancement device, hand exercise device, relieve pressure, suitable for the elderly, nursing, treatment, rehabilitation personnel: in fact, the gyroball will not bear too much burden, can improve the blood circulation of the finger, prevent nerve damage Project start method : 1, wear a special wrist strap, prevent wrist ball drop. 2, wrist training with the ball facing up, gently press the inner ball with the thumbs of both hands, push forward alternately along the direction of the inner ball arrow until there is great resistance to forward movement (until the inner ball is difficult to continue rolling forward, about 10 times) 3, hold the ball single-hand (the bottom of the palm), Immediately rotate the wrist as the thumb releases the inner ball (using the wrist as a support point in a rapid, repetitive circular motion). When the inner ball spins faster and the bright lights come on (note: there are some options without LED lights), the wrist training ball has begun. If the startup fails, repeat the preceding steps Startup points Reminder : 1. When pushing the inner ball, the wrist training sphere faces up. As you push forward, press down on the inner ball so that it goes up. Cause of product startup failure: Incorrect way of pushing the inner ball with thumb: not pushing in the direction of the inner ball arrow or pushing times are not enough. Do not retreat. Push forward as far as possible until the inner ball is difficult to roll, but remember not to exert too much force to avoid damaging the inner ball spring 2. Note: It is the rotation of the wrist joint, not the swing of the entire arm 3. Due to its purely mechanical design, there is no power supply, and continuous operation of the wrist training ball requires continuous rotation of the wrist. 4. When the wrist training ball is activated, it emits a cold light (only suitable for wrist power balls with built-in LED lights), brightening as the inner ball's rotation speed increases, while making a pleasant sound 5. After the wrist training ball is activated, it becomes easy to control and the wrist can rotate freely (in different directions, irregularly). When the wrist needs vigorous exercise, simply accelerate the wrist in a circular motion or quickly flip it up and down. Product startup failure cause : 1. thumb push inner ball is incorrect: not push in the direction of the inner ball arrow or push times are not enough. 2. Incorrect rotation: The wrist joint should be in a circular motion, not the entire arm swing 3. Due to the structural design of the inner ball, in order to successfully capture the inner ball spring, the wrist training ball must face up when starting to push the inner ball. 4. During transportation, individual product components may be damaged and unable to start. 5. If you encounter any problems, please feel free to contact us, we will give timely help and properly solve. Thanks for your support!

Brand: JIN BD


Material: ‎Silicone,Polycarbonate,Plastic


Color: Blue with LED light


Age Range (Description): Adult


Item Weight: 331 Grams


Brand: ‎JIN BD


Material: ‎‎Silicone,Polycarbonate,Plastic


Color: ‎Blue with LED light


Age Range (Description): ‎Adult


Item Weight: ‎331 Grams


Sport: ‎Exercise & Fitness


Item Diameter: ‎3.14 Inches


Number of Items: ‎1


Construction Type: ‎Plastic, Silicone


Unit Count: ‎1.0 Count


Item Package Dimensions L x W x H: ‎3.78 x 3.74 x 3.07 inches


Package Weight: ‎0.33 Kilograms


Item Dimensions LxWxH: ‎3.15 x 3.15 x 2.36 inches


Brand Name: ‎JIN BD


Country of Origin: ‎China


Manufacturer: ‎JIN BD


Part Number: ‎10000


Style: ‎Strength training ball


Outer Material: ‎plastic


Date First Available: May 10, 2021


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Sunday, Aug 2

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Top Amazon Reviews

    • This thing is radical! The ultimate fidget spinner with a bonus……
Color: BLACK
The media could not be loaded. This is a piece of radical engineering! It’s crazy fun! Better than the best fidget spinner, with the ability to help strengthen your hand, arm & wrist. Ok, let’s get serious. I bought this after getting a “boxer’s break” on my dominant hand, it’s been two months and I seriously needed to do something to get my wrist and grip, and hand back in top notch condition. The first thing I will mention is, if you are not holding this flat, you may find that the winder doesn’t wind. Hold it flat, and it should wind right up. Provided you wind in the direction the arrows indicate. If holding it flat doesn’t work try various positions, it has a tiny “ clutch” that needs to engage for it to wind. Don’t over wind it!!If you are one of those reviewers who say the winder broke, hold it flat! Hopefully you didn’t crank the life out it. I will also say the ball without lights is slightly smaller in diameter, and easier to hold, if you have small hands. The lights add slightly more weight as they require a magnetic “switch” to work. Most of the time I am not paying a lot of attention to those lights, though they add a touch of awesome factor. They have little to do with the exercise I need to help heal my hand. Personal preference? I can do without the lights. I have both lighted and non lighted models, and the lighted model seems to be not balanced quite as smooth as the non lighted version, as a result of the extra weight the lights require, and they are off set to one side. Most wouldn’t notice this fact, I do. I have been using this for up to a half hour at a time. I don’t feel the pull or burning in my muscles that others talk about, but after two days I can actually notice a difference in hand function. Though slight. It’s an improvement. After researching to the nines, I decided on this little gem. I wasn’t sure I could make it sing! I have Cerebral Palsy, so my muscles and hands are affected in how I can keep a rhythm going, you need rhythm for this baby. Ten minutes out of the box and I hit what I call the “sweet spot”. Some lazy circles with the wrist and soon she was singing! It makes a slight “turbo” sound, you can hear it wind up like a mini turbo! At that point, it takes a bit of a grip to hold on. Particularly if you are new to this, with hand issues. Which is why I purchased this to begin with. I chose black with lights. The lights are a touch of fun! I had so much fun learning to use this, believe me if I can get her to sing anyone can! One thing I find amusing is. You are exercising and hardly know it, you are having so much fun playing with this. You get a work out while having fun and relaxing, in your back yard, while on your lunch break, watching a movie, even reading a book. I’m amazed at how much “centrifugal” force this gyro puts out. Once you hit the sweet spot she’s smooth as glass, and you fight against gravity, so to speak. At first I didn’t get it wound as tight as I should have, there’s no need to wind it until it stops, just until there’s a good tight feel to it. When you see the gyro rotate, you are ready. Get a good grip and start making lazy circles as if you are swirling ice cubes in a glass. Or drawing circles in the air. Don’t stop, don’t lose your rhythm & don’t go too fast, particularly at first. Soon it will pick up speed and force, from there, make smaller, and smaller circles , just have at it, you can keep her going indefinitely, with very little movement of the hand. I can keep it going nicely in either hand, though being right handed, that hand is more in tune with the rhythm, now after two days I can easily start it in either hand. Practice, & it’s like riding a bike, you just pick it up, & you are making it sing in seconds. This gives a real awesome work out. I don’t recommend jumping in full bore with a boxer’s break, or any other condition without consulting a doctor. It came in a nice little case! I love this thing. So portable, slip it in a Fanny Pack, or gym bag, or take it with you! The wrist strap is nice, but it was in the way of getting a good grip in my small hands, so I am not using it. This is well worth the money, go ahead and drop the coins. You will not regret it if you are in the market, this is an awesome piece of equipment. ... show more
Reviewed in the United States on April 6, 2023 by Kaysie
    • Great product, great customer service
Color: BLUE
[11/26/23] The product is well packaged and arrived in visually good condition. I have watched many videos and read the instructions. None of this has helped me. I had a friend that has a competitor product try this. He could not get it to work either. There is a nice card inside the package that asks the buyer to contact the seller if there are issues. However, there is no contact information. Something is missing. Seller, please contact me. Thank you! [12/5/23] I have updated the review and the rating. The seller contacted me right away and offered a refund. I very much appreciate this fine gesture on the part of the seller. [1/3/24] My nephew visited me and I was talking to him about the issues I had. He watched some videos and got it to work! Two things that I needed to do differently: (1) I needed to wind up more and (2) My wrist speed needed to be lower to get it going. Both of us enjoy using the product and is definitely helpful for my elbow issues. ... show more
Reviewed in the United States on November 26, 2023 by mgravi
    • Good machine
Color: BLUE
This thing will work your arm off.
Reviewed in the United States on February 16, 2024 by Wesley I Williams
    • Forearm gains are real.
Color: BLACK Without Light
Great product, I keep it in my truck and use it most days on the way to work. Starting out even 45 seconds was tough and keeping it going was hard on my left hand. Now I can go 5-10 minutes on both hands. Wrists feel healthy, I don’t even think about my hands/wrists when benching anymore. I feel stronger and more stable. I would absolutely recommend this. ... show more
Reviewed in the United States on February 15, 2024 by Andrew Martin
    • Works fine
Color: BLUE
You folks that treat this like it’s a self propelled toy, need patience. It’s not a toy! It works but you need a little practice. You don't just get it spinning then stop and watch it. There is no time set! It will continue to spin as long as you provide minimal motion. Watch the video. Hint: use minimal clockwise tilt. Can’t emphasize enough. Use the lanyards If it gets going and you let go, it can hurt you or break something. Have fun! Your wrist will get stronger too! ... show more
Reviewed in the United States on February 11, 2024 by BHunted
    • Does NOT have flashing LED's
Color: BLACK Without Light
The only reason I bought it is because my old one's LEDs stopped working. Despite the ad which says 'flashing LED's' the instructions say 'not all contain LED's' Boo. Misleading. Works fine, but no LED's
Reviewed in the United States on December 1, 2023 by D. Butts
    • Works well, takes practice.
Color: BLACK Without Light
Using this item is an art, kind of like riding a bicycle. I suspect that many of the 1 star reviews were from folks who did not or could not master the art (but they could indeed have had faulty products). The product I received worked well. I like the spring-loaded starter on this model, it is better than a string start previous models have had. When using this correctly it applies significant torque to your wrist and wants to fly out of your hand. I don't think it would work well for anyone with arthritis of the wrist. Durability remains to be seen. ... show more
Reviewed in the United States on November 17, 2023 by the sound barrier
    • A unique work out
Color: BLACK Without Light
Review Image by Matt Busch Matt Busch
Review Image by Matt Busch Matt Busch
This product is a unique way to work the muscles in your hands wrists and forearms. The pros I found for this product were that it is a fun and new way to strengthen the muscles in a person's hands, it has a shape that is relatively easy to hold and the use for workout is straightforward. The cons I encountered is the product does not fit as easily in everyone's hands. Someone with smaller hands for example would have a hard time using the product. Another potential issue for some is the moving parts of the product can pinch the users skin causing blisters. With that in mind once the gyroscope is started you have to wait for it to stop naturally as trying to stop it with fingers could lead to pinching. You also want to keep the wriststap on so you don't accidentally throw it at something. ... show more
Reviewed in the United States on February 19, 2024 by Matt Busch Matt Busch

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