Sleep Wearable Form Factor
Compare smart rings, fitness bands, and smartwatches for overnight sleep tracking: comfort, battery habits, and sleep metric depth.
KOSPET T4 SE Black Smartwatch, Black
Features
- 1.43-inch AMOLED display with 466 x 466 resolution and always-on display
- Bluetooth 5.3 smartphone connection; supports Android and iOS
- Touchscreen and physical buttons; calls can be controlled and answered via the watch
- Steel case and replaceable steel strap, both black; butterfly clasp
- IP69K and MIL-STD-810H protection ratings; 10 ATM water resistance
- Built-in heart rate monitor, blood oxygen measurement, GPS, altimeter, barometer, pedometer and ambient light sensor
- Maximum runtime in normal mode: 1500 hours
- 32 GB built-in storage; magnetic charging and fast charging
General specs
- Brand: KOSPET
- Model: T4 SE
- Seller: Rulez BY
- ID: 1442709
- NFC: No
- ANT+: No
- Brand: Kospet
- Calls: Call control and conversation via the watch
- Wi-Fi: No
- Width: 48.6 mm
- Length: 48.6 mm
- Weight: 250 g
- App Store: No
- Thickness: 13.7 mm
- Case Color: Black
- Clasp Type: Butterfly clasp
- ECG sensor: No
- Model Name: T4 SE
- Depth gauge: No
- Strap Color: Black
- Display Size: 1.43 inches
- Product Type: Smartwatch
- Case Material: Steel
- Charging Type: Magnetic
- Fast Charging: Yes
- Notifications: SMS, email, calendar, social networks, incoming calls, workout data and alarm
- Product family: Tank
- Remote Control: Smartphone camera and smartphone music player
- Sport profiles: Strength training, cardio training, walking, running, cycling and swimming
- Strap Material: Steel
- Watch controls: Touchscreen and physical buttons
- Watch payments: No
- Voice Assistant: No
- Workout planner: Yes
- Built-in storage: 32 GB
- SIM Card Support: No
- Always-on display: Yes
- Replaceable strap: Yes
- Smart alarm clock: No
- Display Resolution: 466 x 466
- Display Technology: AMOLED
- Protection Ratings: IP69K, MIL-STD-810H
- Scratch protection: Yes
- Market release year: 2025
- Additional Functions: Sleep tracking, calories burned counting, heart rate monitoring, timer, stopwatch, compass and smartphone finder
- Sensors and tracking: Ambient light sensor, barometer, pedometer, built-in heart rate monitor, blood oxygen measurement, GPS and altimeter
- Built-in music player: No
- Smartphone connection: Bluetooth 5.3
- Water Resistance Rating: 10 ATM
- Blood Pressure Measurement: No
- Supported Operating Systems: Android, iOS
- Skin temperature measurement: No
- Maximum runtime in normal mode: 1500 hours
- First listed by seller: November 5, 2026
If you are interested in more details, you can find full information on the seller's page.
BYN 739.00
Last price update: 11/14/26
Available to order
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Shipping options
Delivery to 
Belarus
Belarus
Available
The Kospet Tank T4 SE is a black smartwatch with a steel case and replaceable steel strap. It has a 1.43-inch AMOLED display, supports calls via the watch, and offers workout planning and sport profiles for strength training, cardio training, walking, running, cycling and swimming.
It has IP69K and MIL-STD-810H protection ratings and a 10 ATM water resistance rating. Maximum runtime in normal mode is stated as 1500 hours.
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| Brand | KOSPET | KOSPET | KOSPET | KOSPET | KOSPET | KOSPET |
| Model | T4 SE | Tank T3 Ultra 2 | Tank S2 | Orb | Pulse | ORB 2 |
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| Price | BYN 739.00 | BYN 330.94 | BYN 337.40 | BYN 232.65 | BYN 209.34 | BYN 344.60 |
| 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 |
| NFC | No | No | No | No | Not present | No |
| ANT+ | No | No | No | No | Not present | No |
| Calls | Call control and conversation via the watch | Call control and conversation supported | Call management and conversation; speaking through the watch is supported | |||
| Wi-Fi | No | No | No | No | Not present | No |
| Width | 48.6 mm | 48 mm | 48 mm | 46 mm | 40.6 mm | 48 mm |
| Length | 48.6 mm | 48 mm | 54 mm | 46 mm | 47.6 mm | 48 mm |
| Weight | 250 g | 83.8 g | 51 g | 44.5 g | 45.5 g | 41 g |
| App Store | No | No | No | No | Not present | No |
| Thickness | 13.7 mm | 13.7 mm | 10 mm | 11.5 mm | 11.5 mm | 12.7 mm |
| Case Color | Black | Dark gray | Titanium | |||
| Clasp Type | Butterfly clasp | Buckle | Buckle | Buckle | Buckle | Buckle |
| ECG sensor | No | No | No | No | Not present | No |
| Model Name | T4 SE | Tank T3 Ultra 2 | Tank S2 | Orb | Pulse | ORB 2 |
| Depth gauge | No | No | No | No | Not present | No |
| Strap Color | Black | Black | White | Black | Black | |
| Display Size | 1.43 inches | 1.43 inches | 1.32 inches | 1.43 inches | 1.96 inches | 1.43 inches |
| Product Type | Smartwatch | Smartwatch | Smartwatch | Smart watch | Smartwatch | Smartwatch |
| Case Material | Steel | Plastic | Metal (aluminum) | Metal (aluminum) | ||
| Charging Type | Magnetic | Magnetic | Magnetic | Magnetic | Magnetic | Magnetic |
| Fast Charging | Yes | No | No | No | Not supported | No |
| Notifications | SMS, email, calendar, social networks, incoming calls, workout data and alarm | SMS, email, calendar, social networks, incoming calls, recent calls list, workout data, and alarm | SMS, email, calendar, social networks, workout data, and alarm | SMS, email, calendar, social networks, incoming calls, workout data, alarm | SMS, email, calendar, social networks, incoming calls, workout data, and alarms | SMS, email, calendar, social networks, workout data, and alarm |
| Remote Control | Smartphone camera and smartphone music player | Smartphone camera and smartphone music player | Smartphone camera and smartphone music player | Smartphone camera and smartphone music player | Smartphone camera and smartphone music player | Smartphone camera and smartphone music player |
| Sport profiles | Strength training, cardio training, walking, running, cycling and swimming | Strength training, cardio training, walking, rowing, yoga, running, cycling, swimming, diving, surfing, snowboarding, gaming sports, martial arts, skiing, and golf | Walking, rowing, yoga, running, cycling, swimming, and surfing | |||
| Strap Material | Steel | Silicone | Silicone | Silicone | Silicone | Silicone |
| Watch controls | Touchscreen and physical buttons | Touchscreen and physical buttons | Touchscreen and physical buttons | Touchscreen, crown (wheel) | Touchscreen and crown (wheel) | Touchscreen and physical buttons |
| Watch payments | No | No | No | Not supported | No | |
| Voice Assistant | No | No | No | No | Not present | No |
| Workout planner | Yes | No | No | No | Not present | Yes |
| SIM Card Support | No | No | No | No | No | No |
| Always-on display | Yes | Yes | Yes | Yes | Present | Yes |
| Replaceable strap | Yes | Yes | Yes | No | No | Yes |
| Display Resolution | 466 x 466 | 466x466 | 466x466 | 466x466 | 410x502 | 466x466 |
| Display Technology | AMOLED | AMOLED | AMOLED | AMOLED | AMOLED | AMOLED |
| Scratch protection | Yes | Gorilla Glass v3 | Yes | Yes | Present | Yes |
| Market release year | 2025 | 2024 | 2026 | |||
| Additional Functions | Sleep tracking, calories burned counting, heart rate monitoring, timer, stopwatch, compass and smartphone finder | Sleep tracking, stress-level tracking, women's health tracking, calorie counting, heart-rate monitoring, breathing exercises, timer, stopwatch, compass, flashlight mode, and smartphone finder | Sleep tracking, women's health tracking, calorie counting, heart-rate monitoring, breathing exercises, timer, stopwatch, compass, and smartphone finding | Sleep tracking, stress-level tracking, women's health tracking, calories burned counting, breathing exercises, timer, stopwatch, calculator, flashlight mode, smartphone finder | Sleep tracking, stress tracking, women's health tracking, calorie counting, breathing exercises, timer, stopwatch, calculator, compass, flashlight mode, and phone finder | Sleep tracking, stress-level tracking, calories burned counting, heart-rate monitoring, timer, stopwatch, compass, flashlight mode, smartphone finder, voice chat |
| Built-in music player | No | No | No | No | Not present | No |
| Smartphone connection | Bluetooth 5.3 | Bluetooth | Bluetooth | Bluetooth | Bluetooth | |
| Water Resistance Rating | 10 ATM | 5 ATM | 5 ATM | |||
| Blood Pressure Measurement | No | Based on sensor readings | No | Not supported | No | |
| Supported Operating Systems | Android, iOS | Android, iOS | Android, iOS | |||
| Skin temperature measurement | No | No | No | No | Not supported | No |
| GPS | Yes | Yes | No | Not present | Yes | |
| Altimeter | Yes | Yes | No | Not present | No | |
| Barometer | Yes | Yes | No | Not present | No | |
| Pedometer | Yes | Yes | Yes | Present | Yes | |
| Smart alarm | No | No | No | Not present | No | |
| Built-in camera | No | No | No | No | ||
| Operating System | Kospet OS | Kospet OS | Kospet OS | |||
| Bluetooth Version | 5.3 | 5.3 | 5.3 | |||
| Display Brightness | 1000 nits | 1000 nits | 1000 nits | 1000 nits | 1000 nits | |
| Heart Rate Monitor | Built-in | Built in | Built in | Built-in | Built-in | |
| Ambient light sensor | No | No | No | Not present | No | |
| Automatic workout recognition | Yes | Yes | Yes | Present | ||
| Blood oxygen saturation measurement | Yes | Yes | Yes | Yes | ||
| Supported smartphone operating systems | Android, iOS | Android, iOS | Android, iOS | |||
| Maximum operating time in ordinary mode | Up to 360 hours | 12 hours | 408 hours | 408 hours | 384 hours | |
| Sports profiles | Strength training, cardio training, walking, running, cycling, swimming | Strength training, cardio training, walking, running, cycling, and swimming | Strength training, cardio training, walking, rowing, yoga, running, cycling, swimming, team sports, skiing | |||
KOSPET T4 SE Black
BYN 739.00
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