Sleep Wearable Form Factor
Compare smart rings, fitness bands, and smartwatches for overnight sleep tracking: comfort, battery habits, and sleep metric depth.
KOSPET Tank M3 Ultra Black Smart Watch
Features
- IP69K & MIL-STD-810H durability
- Built-in GPS
- Heart rate & SpO2 monitor
- 1.96 inch AMOLED display
- 360-hour battery life
- 2.2 x 1.7 x 0.5 inches
- 0.17 lbs weight
- Bluetooth calling
- iOS & Android compatible
- 15 sports modes
- Magnetic charging
- Gorilla Glass 3 protection
- Sleep & stress tracking
- Compass & altimeter
General specs
- Brand: KOSPET
- Model: Tank M3 Ultra
- Seller: Rulez BY
- ID: 1079951
- SKU: 3437792
- Brand: Kospet
- Model: Tank M3 Ultra
- Product Type: Smartwatch
- First listed by seller: June 17, 2026
If you are interested in more details, you can find full information on the seller's page.
BYN 291.42
Last price update: 11/14/26
Available to order
Price History for seller Rulez BY
We may earn a commission
Shipping options
Delivery to 
Belarus
Belarus
Available
Built for the off-grid adventurer, the Kospet Tank M3 Ultra smartwatch delivers rugged reliability when your day takes you beyond paved roads. Whether you're summiting a peak or diving into whitewater, its military-grade toughness (MIL-STD-810H) and IP69K waterproof rating keep it ticking through dust, shocks, and submersion. The vivid 1.96" AMOLED display stays crisp under glaring sun, so your route, vitals, and notifications are never washed out.
Stay connected to your health and safety. On-wrist sensors track heart rate, blood oxygen, and even estimate blood pressure. With built-in GPS, you log your path without your phone. The altimeter, barometer, and compass add situational awareness on the trail. After sunset, you glance at the always-on display without waking the device. Touchscreen and physical buttons operate with wet gloves. After a week on the trail, the battery bar barely moved; 15 days of typical use means you pack less gear and worry less about recharging.
Beyond survival, life balance matters. Sleep monitoring reveals recovery patterns. Stress tracking nudges you to breathe. Swim, run, cycle, ski—over 170 sport modes auto-detect your movement. Take calls on the watch via Bluetooth, control your music, or find your phone. The Kospet Tank M3 Ultra is your uncompromising outdoor partner.
Similar products comparison
| This item | Recommendations | |||||
|---|---|---|---|---|---|---|
KOSPET Tank M3 Ultra black IP69K & MIL-STD-810H durability
|
KOSPET Tank M4C Black IP69K dust/water/shock resistance
|
KOSPET Tank M4C Silver 1.96-inch AMOLED always-on display
|
KOSPET Tank T4C Silver 1.5-inch AMOLED always-on display
|
KOSPET Tank T3 Ultra 2 Silver IP69K & MIL-STD-810H Ruggedness
|
KOSPET Tank T4 Black 10 ATM waterproof and MIL-STD-810H certified
|
|
| Brand | KOSPET | KOSPET | KOSPET | KOSPET | KOSPET | KOSPET |
| Model | Tank M3 Ultra | Tank M4C | Tank M4C | Tank T4C | Tank T3 Ultra 2 | Tank T4 |
| Color |
|
|
|
|
|
|
| Price | BYN 291.42 | BYN 504.83 | BYN 525.84 | BYN 504.83 | BYN 330.94 | BYN 552.71 |
| Seller | Rulez BY | Rulez BY | Rulez BY | Rulez BY | Rulez BY | Rulez BY |
| Update | Nov 14, 2026 | Nov 14, 2026 | Nov 14, 2026 | Nov 14, 2026 | Nov 14, 2026 | Nov 14, 2026 |
| Product Type | Smartwatch | Smart Watch | Smart Watch | |||
KOSPET Tank M3 Ultra black IP69K & MIL-STD-810H durability
BYN 291.42
We may earn a commission
When this device makes sense
Product confidence
Reviews
There are no text reviews yet. If you have experience using this product, please leave a review. It will help other people decide whether this product is right for them.