Whether you’re swimming, snorkeling, or deep diving, the TANK M4 stands out with its rugged design. Beyond diving, it supports a wide range of sports modes, with long battery life to power extended training and offline maps to keep every outdoor adventure on track.
Third-party App Compatibility : Syncs with Apple Health & Strava
Rugged Aesthetics Reinvented
Battle -50℃ extreme cold, outlast 70℃ blazing heat, endure humidity, shock, and more — KOSPET TANK M4 is a tactical smartwatch, tested by SGS, an independent European lab, against 20 U.S. MIL-STD-810H standards, ready for your most rugged adventures. An integrated ambient light sensor ensures its 1.96-inch AMOLED display remains clear from dawn to dusk.
Inox Shield Structure from Top to Bottom
From the bezel and the case to physical buttons, KOSPET TANK M4 is sculpted with an Inox 360 shield structure featuring full stainless steel construction, striking the perfect balance between exceptional strength and timeless design.
Proven Toughness, SGS Tested
Tested and proven by SGS, the Europe’s leading independent lab, KOSPET TANK M4 demonstrates its superior resilience and toughness by passing up to 20 U.S. MIL-STD-810H tests. The rugged smartwatch thrives with you, however dusty, muddy, or rainy the adventure gets.
Brave Deeper with Confidence
With 10 ATM and IP69K water resistance ratings, KOSPET TANK M4 is not just a rugged smartwatch but also a reliable scuba diving watch alternative. It is built to endure 100-meter water pressure and support dives up to 45 meters—making every swim, surf, or dive worry-free.
10 ATM
Water Resistance Tested by SGS, Europe’s leading independent lab.
Delve Deeper with Ambition
Built to endure 10 ATM and IP69K conditions, the KOSPET TANK M4 functions as a versatile waterproof smartwatch, offering three dedicated dive modes to enrich your underwater experiences. Explore a wide array of diving metrics, including depth, dive time, ascent and descent rates, and more.
Besides tracking surface intervals crucial for diving safety, KOSPET TANK M4 monitors each freediving session with data like dive time, maximum depth, and average temperature, complemented by its built-in breath-holding training and tests for improved stamina.
Maximize Your Sports Performance
Thanks to support for 23 ApexMotion sports modes and 160 freestyle training modes, KOSPET TANK M4 stands out among cool outdoor watches, serving to track your every movement and every effort through a broad range of specialized data — from real-time running metrics and elevation gain to pool laps and gym workouts.
Run Smart, Race Fast
From real-time pace and cadence during track running to VO2 max and recovery time in trail running, KOSPET TANK M4 assists you to measure your every move, every effort, and every improvement.
Running
Cycling
Swimming
Skiing
Mountaineering
More Modes
Every Move Counts
With its advanced 6-axis gyroscope, KOSPET TANK M4 keeps up with your intense workouts and swift directional changes. It accurately captures shifts in motion, posture, and momentum — delivering more precise data, smarter activity analysis, and deeper insights into how your body performs when it matters most.
Stay Way Ahead of the Curve
KOSPET TANK M4 is designed for elite runners and those who aspire to push their limits. With support from precision dual-band (L1+L5) and six satellite positioning systems, the smartwatch tracks every lap in track running and every route during trail running with exceptional precision.
Full-Blown Positioning Accuracy
To give a strong boost in positioning and keep pace with your performance, KOSPET TANK M4 leverages the brand new OPDR algorithm that tracks your real-time activity status despite weak or unavailable GPS signals — under bridges, among high-rise buildings, and other challenging conditions.
32GB Storage, More Space for What Matters
KOSPET TANK M4 is a smartwatch with 32 storage capacity for impressive music and offline map storage. It holds about 100 offline maps or 5,000 songs, giving you both navigation and entertainment without relying on your phone—perfect for staying informed and inspired on the go.
Route Import & Offline Map Support
Chart and navigate your own path with KOSPET TANK M4 — import GPX or KML route files via the Apexmove App or download offline maps online using your computer or tablet.
Stay in Touch with Walkie-talkie
Whether you are cycling through the woods or hiking along a trail with your friends, use the built-in Walkie-talkie on KOSPET TANK M4 to instantly communicate with each other via a simple touch-and-hold.
Shed More Light on Your Health
Powered by the cutting-edge 4PD health sensor that captures richer optical signals for improved measurement precision, KOSPET TANK M4 elevates daily health monitoring to a whole new level, even during high-intensity workouts.
24H Wrist-based Health Management
Heart Rate MonitoringStay informed about your heart health with all-day heart rate monitoring and abnormal heart rate alerts, all supported on the KOSPET TANK M4, a rugged waterproof heart rate monitor watch built for both daily use and outdoor adventures.
Blood Oxygen MonitoringKOSPET TANK M4 measures your SpO2 throughout the day with low blood oxygen alerts to keep an eye on the condition of your respiratory system.
Sleep TrackingCreate a sleep schedule that suits you and wake up to your sleep progress and total time spent in main sleep stages (including REM) on KOSPET TANK M4.
Menstrual Cycle TrackingKOSPET TANK M4 tracks your menstrual cycle for better health with predictions and reminders for your upcoming period, fertile window, and ovulation day.
One-Tap Health CheckEasily monitor your heart rate, blood oxygen, stress level, and mood with a single tap on KOSPET TANK M4 for a comprehensive overview of your health status.
Keep Pace with You for Longer
With up to 15 days of typical use, KOSPET TANK M4 is a smartwatch with long battery life meticulously built to perform in peak condition, so you never have to worry about power between charges while moving, training, or exploring.
Power On, Power Through
Lightweight, compact, and easy-to-store, our new power pocket can deliver more than one full charge for KOSPET TANK M4. Featuring a magnetic connector, the power pocket allows for simultaneous charging with the smartwatch.
