SPECIFICATIONS

The KOSPET Tank M4 Smartwatch is a premium rugged smartwatch built for outdoor enthusiasts, hikers, runners, divers, and adventure travelers. It combines dual-band GPS, offline maps, compass, barometer, altimeter functions, 10ATM/IP69K waterproof protection, and a bright 1.96-inch AMOLED display in a durable stainless-steel body.

Key Features

GPS & 6-Satellite Positioning

The watch supports dual-band GNSS (L1+L5) and six satellite systems for improved positioning accuracy during outdoor activities. It also supports route importing and offline maps for navigation without relying on a phone.

Offline Maps & 32GB Storage

With 32GB of onboard storage, the TANK M4 can store offline maps, routes, and music, making it useful for hiking, trail running, cycling, and remote adventures.

Rugged Stainless-Steel Construction

The watch features an Inox 360 stainless-steel structure and has been tested against multiple MIL-STD-810H durability standards for shock, vibration, temperature, and environmental resistance.

Diving & Water Sports

One of its standout features is support for:

• Freediving mode
• Scuba diving mode
• Gauge mode

The watch carries 10ATM and IP69K ratings and is designed to support dives up to approximately 45 meters (148 ft).

AMOLED Display

• 1.96-inch AMOLED touchscreen
• Up to 1000 nits brightness
• Automatic brightness adjustment
• Always-clear outdoor visibility

These features make it easy to read under direct sunlight.

Health & Fitness Tracking

The TANK M4 includes:

• 24/7 heart-rate monitoring
• Blood oxygen (SpO₂) tracking
• Sleep tracking
• Stress monitoring
• Recovery metrics
• Multiple sports modes

It supports more than 180 activity and training modes.

Battery Life

Typical battery performance includes:

• Up to 15 days of normal use
• Up to 21–22 hours of continuous GPS tracking
• Up to 5–6 days with Always-On Display enabled

Actual results vary by usage.

Specifications

Feature	Details
Display	1.96" AMOLED
GPS	Dual-Band L1+L5
Navigation	Offline Maps & Route Import
Storage	32GB
Water Resistance	10ATM + IP69K
Dive Support	Up to 45m
Health Tracking	Heart Rate, SpO₂, Sleep, Stress
Battery Life	Up to 15 Days
Compatibility	Android & iOS
Construction	Stainless Steel

Strengths

✔ Offline maps and route navigation
✔ Excellent water resistance for diving and swimming
✔ Bright AMOLED display with auto-brightness
✔ Long battery life
✔ Rugged stainless-steel construction
✔ Large onboard storage for maps and music
✔ Comprehensive outdoor and fitness features

Considerations

Some users on smartwatch forums have praised the GPS accuracy, offline maps, display quality, and durability. However, a number of users have also reported firmware-related issues involving health tracking, GPS recording, syncing, and occasional stability problems, particularly after certain firmware updates. Community feedback appears mixed, suggesting that keeping firmware updated is important.

Verdict

The KOSPET Tank M4 Smartwatch is one of the more feature-rich rugged smartwatches in its price range, offering capabilities typically found on higher-end outdoor watches: offline maps, dual-band GPS, diving support, military-grade durability, and long battery life. It is especially attractive for hikers, campers, cyclists, divers, and outdoor adventurers looking for a rugged smartwatch without paying premium flagship prices.

24H Monitoring: Heart rate, Blood oxygen saturation, Stress level, Mood

AOD Mode Battery Life: Up to 5-6 days

APP Download Available: Yes

Activity Tracked: Other,Steps Tracker,Distance Tracker,Calorie Tracker,Activity Tracker

Alarm Click: Support

App Notifications: Support

App name: Apexmove App

Application: Apexmove App

Application Age Group: Men

Auto-brightness: Support

BT Earphones: Support

BT Phone Camera Control: Support

BT Phone Music Control: Support

Band Detachable: Yes

Band Material: Silica Gel

Band width[mm]: 22

Barometric Altimeter: Support

Battery Capacity: 500mAh

Battery Capacity(mAh): >450mAh

Battery Detachable: No

Battery Life: 15 days

Battery Type: Pure cobalt battery

Bluetooth-compatible Version: 5.3

Body Material: Bezel: Stainless Steel, Case: Stainless Steel, Back panel: Stainless Steel, Cover glass: Corning Gorilla Glass 3

Brand Name: kospet

Buckle Material: Stainless steel

CPU Model: ATS3089

Calculator: Support

Call Quick Reply: Support

Case Material: STEEL

Category: Smart Watches

Certification: CE,FCC,RoHS,KC

Charging Method: Magnetic charging base

Colors: Black, Silver

Compass: Support

Compatibility: All Compatible

Connection: BT V5.3

Continuous GPS Usage Battery Life: Up to 21-22 hours

Dimensions (without sensor base): 50.5*42.5*13mm

Display Size: 1.96

Dive Modes Support: 3 (Freedive, Scuba dive, Gauge)

Do Not Disturb: Support

Dual-band (L1+L5): Support

Extreme Weather Alerts: Support

Find My Phone: Support

Flashlight: Support

Function: Shock Resistant,Passometer,fitness tracker,sleep tracker,Mood Tracker,Message Reminder,Call Reminder,Answer Call,Dial Call,Remote Control,Push Message,Altitude Meter,Big Three Needles,24 hour instruction,Chronograph,Alarm Clock,Small Second,World Time,Calorie Counter,DIVER,Power Reserve,GMT Two Places,week,Month,Heart Rate Tracker,Interactive Music,Noctilucent,Thermometer,Calendar,Compass,Countdown,Calculators

GPS: Yes

GPS Time/Altitude Calibration: Support

Health: VC9213-4PD sensor (supports blood-oxygen)

Health Alerts: Abnormally high & low heart rate, Low blood oxygen level

Heavy Use Battery Life: Up to 9-10 days

High-concerned chemical: None

Language: English,Russian,Spanish,Polish,Portuguese,Turkish,Italian,French,German,Norwegian,Korean,Japanese,Ukrainian,Hebrew,Dutch,Arabic,Indonesian,Greek

Languages: English (default), German, Spanish, French, Italian, Portuguese, Russian, Dutch, Czech, Hebrew, Hungarian, Romanian, Finnish, Persian, Swedish, Danish, Greek, Polish, Ukrainian, Norwegian, Croatian, Serbian, Arabic, Turkish, Korean, Japanese, Malaysian, Filipino, Belarusian, Bengali, Indonesian, Thai, Vietnamese, Khmer, Urdu, Simplified Chinese, Traditional Chinese

Launch Date: 2025

MCU + DSP: ATS3089

Manual Measurements: Heart rate, Blood oxygen saturation, Stress level, Mood, One-tap measurement

Material: AMOLED,Liquid silicone

Mechanism: No

Metrics measured: Heart Rate Monitor,Women's Health Monitoring,Blood Oxygen Monitor,Sleep Monitor

Mic: Support

Min. & Max. Wrist Dimensions: 150-240mm

Model: TANK M4

Moon Phase: Support

Morning Updates: Support

Motor: Support

Movement & Contact: 6-axis gyroscope sensor, Geomagnetic sensor, Barometric altimeter, Ambient light sensor, Temperature sensor

Movement Type: Electronic

Multiple Dials: Yes

Music Storage: Support

Network Mode: None

Offline Map Styles: Topographic maps, Contour maps, Both map styles

Offline Maps: Support

Other Health Features: Menstrual cycle tracking, Breathing exercise

PPI: 461

Peak Brightness: 1000 nits

Phone Call Notifications: Support

Plan Creation: Training plans (via the Apexmove App)

Positioning: Dual-band, 6 satellite positioning systems

RAM: <128MB

ROM: 32 GB

Real-time Navigation: Support

Rear Camera: None

Removable Strap: Support

Resolution: 410*502

Route & Location Point Creation: via the Apexmove App

Route Deviation Reminders: Support

Route Import: Support

SIM Card Available: No

SMS Notifications: Support

Satellite Positioning Systems: 6

Screen Lock & Password: Support

Screen Material: AMOLED

Screen Shape: SQUARE

Sedentary Reminder: Support

Shortcut Cards: Support

Sleep Tracking: Sleep stages (including REM), Daytime naps

Smart Recognition: 6 sports movements (Walking, Running, Cycling, Elliptical trainer, Rowing machine, Still)

Speaker: Support

Sports Convenience: Workout data stays on-screen, Conditional pause

Sports Modes: 183 (including 23 ApexMotion sports modes and 160 Freestyle training modes)

Stopwatch: Support

Style: SPORT

Sunrise & Sunset: Support

Support Alexa: N

Sync to 3rd Party Fitness Apps: "For iOS: Apple Health, Strava For Android: Samsung Health, Google Fit, Strava"

System: Wacth OS

System Requirements: Android 7.0 and above, iOS 14.0 and above

Theoretical Charging Duration: Approx. 2 hours

Tides: Support

Timers: Support

Touch Screen: Yes

Type: On Wrist

Typical Use Battery Life: Up to 14-15 days

Voice Assistant: Support

Voice assistant built-in: Yes

WIFI: no

Walkie-talkie: Support

Water-resistance Grade: 10ATM & IP69K Waterproof

Waterproof Grade: 100m & up

Weather: Support

Weight (without strap): 80g

Weight[g]: 80

World Clock: Support