TOZO AMOLED S4 AcuFit One Smart Watch 1.78" Ultra-Clear Screen for Men Women, Call/Answer Fitness Tracker, Sleep Monitor IP68 Waterproof for iOS 11.0+ Android 9.0+ Black
Condition: New
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30-day refund / replacement
To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
Availability:
20 left in stock
Arrives
Monday, Sep 15
Recently Viewed
Color: Black
Features
- User-Friendly Design with AMOLEDFeaturing an upgraded 1.78'' ultra-clear AMOLED HD Display with 368*448 resolution, which has 25% faster response speed than previous, a wider visual range, lower energy consumption, wider color gamut, and higher contrast, TOZO S4 takes you to experience unprecedented crystal clear visual effects.
- All-in-One Smart WatchTOZO smart watch is the perfect companion for both men and women, combining a fitness tracker and a stylish accessory all in one. Stay connected with its Bluetooth calling feature, as well as call logs and message notifications.
- Comprehensive Health MonitoringTOZO S4 adopts an high-precision sensor that accurately stress testing in real time. Furthermore, the health watch tracks your sleep patterns to ensure you get the restful night's sleep you deserve, including deep sleep, light sleep, and REM sleep stages.
- Versatile Fitness TrackerWith over 100 different sports modes, our TOZO S4 helps you stay active and reach your fitness goals. Whether you're running, cycling, or practicing yoga, this watch will accurately track your workouts and provide valuable insights to improve your performance.
- Worry-free Battery LifeEquipped with a high-capacity 300 mAh battery that ensures up to 7 days of use on a single charge, ultra-long 30 days standby mode, and takes only about 2 hours to fully charge, The activity tracker fulfills your need for long battery life on business trip or travel. Plus, it is waterproof, making it perfect for daily outdoor activities.
Operating System: NO
Memory Storage Capacity: 128 MB
Special Feature: Activity Tracker, Email, Text Messaging, Touchscreen
Battery Capacity: 300 Milliamp Hours
Connectivity Technology: Bluetooth
Wireless Communication Standard: Bluetooth
Battery Cell Composition: Lithium
GPS: No GPS
Shape: Square
Screen Size: 1.78 Inches
Product Dimensions: 6.46 x 4.5 x 0.75 inches
Item Weight: 1.38 ounces
Item model number: S4
Batteries: 1 Lithium Metal batteries required. (included)
Date First Available: November 7, 2023
Manufacturer: TOZO
Item Weight: 39 Grams
Standing screen display size: 1.78 Inches
Memory Storage Capacity: 128 MB
Ram Memory Installed Size: 128 MB
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Monday, Sep 15
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.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
- Klarna Financing
- Affirm Pay in 4
- Affirm Financing
- Afterpay Financing
- PayTomorrow Financing
- Financing through Apple Pay
Learn more about financing & leasing here.
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Top Amazon Reviews
Color: Black
Budget is not as bad thing...tech can cost so much these days but is it really worth it? The price point of this watch is prefect if you are looking to start wearing a smart watch, or simply need a watch for the time, activity tracking, app alerts and basic health. This is not as fully featured as a Google Wear, Samsung or Apple watch.... but it's also a fraction of the price. It is comfortable to wear all day, the battery lasts the whole week, I get all my alerts and calls so it does all I need. It is a great product from a great company.
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Reviewed in the United States on July 11, 2025 by Mr & Mrs. Younger
Color: Black
I'm becoming a TOZO fan boy! I have the NC9 earbuds and HT2 headphones. Impressed with both of those I ordered the S4 smartwatch. I have been wearing my S4 for a few days now and have to say I love it! The size is perfect. The screen is very clear and very bright, making viewing easy, especially at night. I use mine mostly for the time and weather information and answering phone calls. There are many health monitoring functions available that I need to start taking advantage of. The watch is very comfortable and looks great! Three days and the battery is still at 73%. The screen blacks out until you raise your arm or turn your wrist to look at it, works awesome. TOZO products are priced far below most of the competition and the quality is excellent! I purchased all three items for the cost of one of most other brands! I hope you give TOZO a try, you won't be disappointed!
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Reviewed in the United States on May 21, 2025 by Ron Ron
Color: Black
I am pleased with the comfort and features of this watch. The battery life is good. It’s comfortable to wear on sensitive skin, unlike other watches that caused itchiness. The app is pretty seamless and I haven't experienced any glitches between the watch and the app. There’s a lot of good available data, especially the “Wellness Balance” score. I would love to see a speed increase in the loading of the data. Also, the text on watch faces could be a bit larger, making it easier to read. I would buy again and recommend to friends and family looking for a nice smart watch at a reasonable price.
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Reviewed in the United States on February 20, 2025 by Caduceus26
Color: Black
I had a FitBit and an Apple Smartwatch previously that I loved but both were getting outdated. I decided to see what was out there to upgrade. I could not believe the features this watch offered for the price. Step counting and making an emergency phone call being most important features for me. This watch easily does those things. Customizable watch face is available, sleep tracking, several kinds of reminders... the one thing I SO WISH would work was receiving my iPhone messages. I get alerts from all of my apps... but will not work with my iPhone messages like my previous two watches. Great services from app customer service but does not work.. I tried and tried so.. if that one thing is not important to you... great watch! Even so - for the money - great watch!
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Reviewed in the United States on January 9, 2024 by C Crites
Color: Black
I purchased the Tozo S4 Smartwatch primarily to use when hiking. I had another Tozo Smartwatch that I used for that purpose but unfortunately misplaced that one. The S4 does have more functionality than my previous smartwatch. Step counter seems to be fairly accurate, which works for me. I just want to have a general idea. If it is off a few steps, not an issue for me. Same with Heart Rate function. The additional benefit to me with this watch is the sleep monitor function. I have horrendous sleep patterns and the monitor pretty accurately captures that. It is a good way to track it as opposed to waking up saying 'another night of crappy sleep'. I have paired the watch with the Tozo Health App and I have found that beneficial as well. Something as simple as looking at upcoming weather forecast while planning a subsequent hike instead of pulling phone out of backpack is convenient. Lastly, I was very impressed with battery life. I think I am only charging about once a week. I have other features on the watch to explore but most certainly happy with this purchase.
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Reviewed in the United States on February 26, 2025 by Bob S
Color: Black
I bought this watch around mid July and it already malfuntion. The screen switches on its own and does not respond correctly to touch screen. Pass this watch up if you need one to last for at least a few months. It went bad soon after the 30 days return period.
Reviewed in the United States on August 31, 2025 by Edwin Vega