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KOSPET

KOSPET Tank M4 Rugged Smart Watch for Men, GPS & Offline Maps, 10ATM Waterproof, 15-Day Battery, 180+ Sport Modes, Full Stainless Steel, Bluetooth Calls, 24/7 Heart Monitor for Android & iOS

  • Based on 851 reviews
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Availability: Only 3 left in stock, order soon!
Fulfilled by Amazon
Arrives Wednesday, Aug 5
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Color: Black


Features

  • Military-Grade ToughnessBuilt with the Inox 360 Shield structure, this rugged smart watch features a durable stainless steel body engineered to withstand extreme conditionsfrom deep freezes at -58F to intense heat up to 158F, Certified by 20 U.S. military-standard tests for proven reliability in the harshest conditions. The 1.96 AMOLED display, equipped with with a 3rd generation Corning Gorilla 9H double-layer glass.
  • Offline Maps & Route PlanningThe TANK M4 GPS smartwatch tracks your movements with outstanding accuracy, powered by an industry-leading dual-band GNSS positioning that connects to six satellite systems. Simply download offline maps and select your route or destination point to run your favorite paths or explore unfamiliar trails.
  • 23 ApexMotion Sports & 160 Sport ModesKOSPET smart watches for men is engineered for professional sports, offering 23 ApexMotion sport modes and 160 freestyle training modes. This sports watch built-in 6-axis gyroscope, it accurately tracks changes in orientation, acceleration, and speed-giving you clearer insight into your bodys responses during key moments of activity.
  • 10ATM Waterproof for DivingBoasting 10 ATM and IP69K ratings, the waterproof smart watch is built for demanding underwater activities, including freediving to depths of 148 feet. Its robust construction ensures it remains securely sealed and reliable under pressure.
  • Extra-Large Battery LifeKOSPET TANK M4 outdoor smart watch, enjoy up to 15 days of battery life on a single charge with typical use, up to 22 hours in GPS mode, providing long-lasting performance for outdoor activitiesenough for hiking, longest running, or cycling.

Description

TANK M4 PULSE 2 Black (New) PULSE 2 Silver (New) TANK M4 Special Edition TANK M4 Special Edition TANK M4C MAGIC R10 KOSPET is an innovative and dynamic smartwatch brand.We are dedicated to providing the ultimate products and services for users who love life and explore nature.Since 2018, KOSPET has established online and offline sales networks in over 100 countries, earning the trust of millions of users. We hope that engaging with KOSPET inspires and encourages users to be more mindful of their health, to discover nature, and to stay connected with the world. Visit the Store Visit the Store Visit the Store Visit the Store Visit the Store Visit the Store Visit the Store

Operating System: Compatible with android 5.1 & ios 10.0 dnd above


Memory Storage Capacity: 32 GB


Special Feature: Activity Tracker, Always On Display, GPS, Notifications, Voice Assistant，Phone Call


Battery Capacity: 500 milliamp_hours


Connectivity Technology: Bluetooth


Wireless Communication Standard: Bluetooth


Battery Cell Composition: Lithium Polymer


GPS: Built-in GPS


Shape: Square


Screen Size: 1.96 inches


Operating System: Compatible with android 5.1 & ios 10.0 dnd above


Additional Features: Activity Tracker, Always On Display, GPS, Notifications, Voice Assistant，Phone Call


GPS Geotagging Functionality: Built-in GPS


Band Material Type: Liquid silicone rubber


Case Material Type: Stainless Steel


Water Resistance Level: Waterproof


Sport Type: Diving, Multi-Sports, Running, Surfing, Swimming


Human Interface Input: Buttons, Touchscreen


Clasp Type: Tang Buckle


Supported Application: GPS


Water Resistance Depth: 100 meters


Language: English


Supported Satellite Navigation System: BeiDou, GLONASS, GPS, Galileo


Controller Type: AI Voice Assistant


Metrics Measured: Sleep Duration, Stress


Battery Capacity: 500 milliamp_hours


Battery Cell Type: Lithium Polymer


Battery Average Life: 50 days


Battery Charge Time: 2 hours


Screen Size: 1.96 inches


Display Type: AMOLED


Maximum Display Brightness: 1000 nit


Band Width: 22 millimeters


Item Dimensions: 9.12 x 1.67 x 0.52 inches


Band Length: 9.13 inches


Warranty Type: Limited


Waterproof Rating: IP69K


Brand: KOSPET


Model Name: TANK M4


Target Audience: Men


Age Range Description: Adult


Model Number: TANK M4


Built-In Media: 1* KOSPET Smart Watch, 1*Charger Station, User Manual, Watch Band


Warranty Description: All KOSPET products come with 1 year product warranty if the original unit is defective.


Wearable Computer Type: Smart Watch


UPC: 738508265118


Manufacturer: KOSPET


Shape: Square


Style Name: Tactical


Color: Black


Band Color: Black


Connectivity Technology: Bluetooth


Wireless Compability: Bluetooth


Communication Feature: Notification, Phone Call, Voice Call


Compatible Devices: Smartphone


Compatible Phone Models: Compatible with android 5.1 & ios 10.0 dnd above


Memory Storage Capacity: 32 GB


RAM Memory Installed: 16 MB


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Wednesday, Aug 5

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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Leasing options through Acima may also be available during checkout.

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Similar Products

Top Amazon Reviews

    • Great Smartwatch
Color: Black
I’m extremely impressed with the KOSPET Tank M4. From the moment I took it out of the box, the full stainless-steel build felt solid, premium, and ready for anything. This watch is clearly designed for durability, but it also looks great on the wrist. The GPS and offline maps work flawlessly perfect for hiking and outdoor adventures without relying on my phone. The 10ATM waterproof rating and support for freediving up to 45m give me total confidence using it around water. I’ve already taken it swimming and it performed perfectly. Battery life is another huge win. I easily get several weeks on a single charge, even with notifications and fitness tracking enabled. Bluetooth calling is clear, convenient, and pairs quickly with my iOS devices. Health tracking feels accurate, especially the 24/7 heart rate monitoring, sleep tracking, and activity stats. The interface is smooth, responsive, and packed with useful features without feeling overwhelming. Overall, this is an exceptional smartwatch for the price rugged, reliable, stylish, and packed with features you normally only see in much more expensive models. Highly recommend the KOSPET Tank M4 to anyone who wants a tough smartwatch that doesn’t cut corners! ... show more
Reviewed in the United States on November 21, 2025 by Cesar E Santiago Alicea
    • A tough, stylish watch with great battery and features
Color: Black
This amazing watch feels solid right out of the box. The stainless steel build gives it a rugged, premium feel, and the screen is bright and easy to see outdoors. The battery life has been impressive so far, lasting days without needing a charge, even with notifications and fitness tracking active. The watch faces are sharp, and switching between them is quick—there are plenty of options to personalize it. The menu layout is simple, the sensors work accurately, and the Bluetooth connection has stayed stable. Overall, it’s a durable smartwatch with a clean look and a lot of features for a great price. ... show more
Reviewed in the United States on December 1, 2025 by Nightwerks
    • Not bad but similar to all others
Color: Black
It's not bad but it's not great. It runs on the same basic proprietary version of software that almost all smart watches use yet they aren't compatible with each other. It loses connection often so a lot of data isn't available and they have yet to fix. If you are ok with that but still have a cool looking watch, this isn't bad. Battery life is same as most. Lasts me almost a week. Display is bright enough in all light conditions. Call sound is pretty loud and good. About the same as all others around 46p ... show more
Reviewed in the United States on May 16, 2026 by crazytekkie
    • Pay grade above the rest
Color: Black
Review Image by Park SoHwan
Review Image by Park SoHwan
Review Image by Park SoHwan
Review Image by Park SoHwan
Review Image by Park SoHwan
Watch comes with basic necessities of silicone or steel watch band, and a charging cable. By far the best iteration of the Tank series. Love the increased customizability from watch themes and custom sounds, but more importantly the stable bluetooth connection compared to older models. The Kospet brand watch is comparable to a Samsung Smart Watch that I was using before, and better for a fraction of the price. I mainly use it for the sedentary reminder, sleep tracker, and to track my calories burnt during workouts and steps throughout the day. A new feature this watch has compared to older versions is storage capacity for offline maps and music which is handy. The quality of the watch is nice, strong, and durable. The touch screen is very easy to clean and smudge-free. Typical battery life for my watch is about every 5 or 6 days. Easy to connect via Android through Apexmove app, and I never have connection issues between my phone and watch now. Overall I am happy with my purchase, and would recommend anyone to invest in Kospet for their sportswatch needs as the app is easy to use, has good customer service, and delivers quality products. ... show more
Reviewed in the United States on January 27, 2026 by Park SoHwan
    • Need a lot of improvements!
Color: Black
Review Image by Sergey
Battery is ok so far , the watches itself is good, but sometimes it glitches, like does not count steps or calories etc , Bluetooth connection and notifications, calls , messages works only 5% of the time, like how come ????? Please do the improvements on stability and main future I bought for .
Reviewed in the United States on July 4, 2026 by Sergey
    • great dive computer substitute but more of a fitness tracker
Color: Black
If you want the surge seeker watch face that displays last dive time and no fly time choose the M4 over T4. Its really more of a fitness tracker than smart watch if you compare to a apple watch apple watch is better on the app side but this is good all around alternative especially if you’re going to use for scuba diving. No downloadable apps. But if you’re looking for a low cost rechargeable dive watch this is great especially if you want the dive profile sent to your phone. Was looking for a face that showed sun up and sun down but they only have them for military time. For scuba diving you will need a larger band unless you’re really skinny or diving without gloves. ... show more
Reviewed in the United States on June 20, 2026 by tyler
    • AWESOME
Color: Black
Review Image by J.R. Haughn
Review Image by J.R. Haughn
Review Image by J.R. Haughn
Review Image by J.R. Haughn
Got this for the dive components available and wanted to try out. There are several reviews out there in this watch, and not going to do same reviews as all others have, as i agree with most all they say. This is a TOUGH WATCH!! I waited awhile until I had a dive to test on, and held up well. I've had other watches that are 'waterproof' but as soon as you get near water, they seem to quit. Not this one. I took to 40+ feet and was actually able to utilize the buttons to navigate through my needs, and surface was back to normal for touch screen uses. Nice feature is the 'water clearing' function!! Use this, and it actually clears water from inside watch. Just run under. Lean water to get off the saltwater, then run the function and it's done! Dive side: actually asked company directly if I can use as actual dive computer to download my dive, and yes you can! Just connect to app and automatically downloads to phone, then use data how you see fit. Is going to be my all in one watch for sure on ALL my travels. Battery last for 2 FULL days of use, and have tested for w weeks on standby and was still at full after non use. Great value for all you get, as there are more than just dive related functions. Only thing is I bought this then a couple weeks later, they dropped the price! Ugh. Accuracy was great other than compass loses a little from time to time and has to be recalibrate. ... show more
Reviewed in the United States on December 28, 2025 by J.R. Haughn
    • So,So purchase
Color: Black
No BP monitor on the watch or app.
Reviewed in the United States on January 7, 2026 by tobin99

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