Introduction
Welcome to the KOSPET TANK M4 Smart Watch user manual. This guide provides detailed instructions on how to set up, operate, maintain, and troubleshoot your new smartwatch. The KOSPET TANK M4 is a rugged, feature-rich smartwatch designed for active lifestyles, offering advanced health monitoring, GPS navigation with offline maps, and professional sports tracking.
Video: KOSPET Tank M4 Smart Watch Product Overview
Setup
Packing List
Ensure all items are present in the package:
- Smartwatch (including strap)
- Magnetic charging dock (including cable)
- User manual (this document)

Image: Size & Packaging Included diagram, showing the watch dimensions, box, strap, charging dock, and user manual.
About the Watch
Familiarize yourself with the watch's components and buttons:

Image: Front view of the KOSPET Tank M4 Smart Watch.
| No. | Component | Function |
|---|---|---|
| 1 | UP button | Press once to scroll up through options. |
| 2 | DOWN button | Press once to scroll down through options. |
| 3 | SEL button | Press and hold to power on/off. Press once to enter App list / return to home screen. |
| 4 | BACK button | Used to count laps / return to other pages. |
| 5 | Heart rate sensor | Monitors heart rate and other health metrics. |
| 6 | Charging port | Connects to the magnetic charging dock. |
Charging the Watch
Use the original KOSPET charger to charge the watch. Ensure both the charger and watch are dry and clean before charging. Use a power adapter with an output current of 500mA or higher, certified to meet safety standards.

Image: KOSPET Tank M4 Smart Watch being charged via its magnetic charging base.
App Download and Installation
To unlock the full potential of your KOSPET TANK M4, download the Apexmove App:
- Method 1 (QR Code): Scan the QR code below with your smartphone to download and install the Apexmove App.
- Method 2 (App Store): Search for "Apexmove" in the Apple App Store or Google Play Store and install the App.

Image: Apexmove App QR Code

Image: Apexmove App logo with App Store and Google Play download buttons.
App Registration and Login
- The App will request necessary permissions on your phone. These permissions are used to enhance user experience and ensure data security.
- Register and log into your Apexmove account. Grant all necessary permissions to fully utilize the smartwatch's features.
Pairing and Connection
There are two methods to pair your KOSPET TANK M4 with the Apexmove App:
Method 1 (QR Code Scanning):
- Press and hold the SEL button for 3 seconds to power on the watch. Select your preferred language and navigate to the QR code interface on the watch.
- Open the Apexmove App on your phone and go to My > My Device.
- Select the scanning icon within the App and scan the QR code displayed on your watch to complete the pairing process.

Image: Screenshots illustrating the QR code scanning method for pairing the watch with the Apexmove App.
Method 2 (Manual Device Selection):
- Press and hold the SEL button for 3 seconds to power on the watch.
- Open the Apexmove App and go to My > My Device.
- Select the Add Device icon, then find "KOSPET TANK T4/M4" from the list of nearby devices and tap to pair.
BT Calling Setup
After connecting your watch to the App, tap "Pair" in the App to enable BT calling. If pairing with an Android phone, confirm BT pairing on the watch. Ensure Bluetooth is enabled on your watch for proper BT calling functionality.
Operating Your Smart Watch
Gesture Operations
Navigate your watch using simple swipe gestures:
- Swipe Down: From the home screen, swipe down to access the Control Center for quick settings and features.
- Swipe Up: From the home screen, swipe up to access Shortcut Cards.
- Swipe Right: From the home screen, swipe right to view unread notifications.
- Swipe Left: From the home screen, swipe left to enter the App List.

Image: Examples of customizable watch faces, menu layouts, icon themes, and shortcut cards.
Professional Sports Algorithms
The KOSPET TANK M4 features 23 professional sports algorithms and 160 freestyle training modes to provide scientific sports data. High-precision motion sensors capture multi-dimensional data for intelligent analysis of your performance.

Image: Professional Sports Tracking modes including Snowboarding, Outdoor Walking, Outdoor Running, Road Cycling, Elliptical Trainer, and Rowing Machine.
Diving Algorithm
Equipped with a professional diving algorithm, the watch supports freediving, scuba diving, and gauge diving. It tracks depth, temperature, ascent/descent speed, and no-decompression limits in real-time for your safety. Select a diving mode from the watch's workout list and configure relevant parameters before scuba diving.

Image: 10ATM & IP69K Built for Diving, showing Freedive Mode, Scuba Dive Mode, and Gauge Mode.
Note:
- For safety reasons, always dive with an experienced buddy.
- Consult a doctor about your physical condition before diving to avoid health risks.
Training Plans
Create personalized training plans in the Apexmove App. Once synced, you can start your training programs directly on the watch and monitor your schedule and progress.
Local Music and Wireless BT Earphones
Transfer music to your watch via the Apexmove App or by connecting the watch to a computer with a USB cable. Enjoy your local music during workouts by pairing BT earphones or playing directly through the watch.
Exploration and Navigation Features
Create location points and routes using the Apexmove App. These can then be synced to your watch for navigation. After entering the navigation or workout page on the watch, select a route or location point to start navigation.

Image: Dual-Band GPS & Offline Map with route import functionality shown on the watch and a smartphone.
Offline Map Feature
To use offline maps:
- Visit https://support.kospet.com/map-download on a computer or tablet.
- Search for your desired region, click "Download," and extract the downloaded file.
- Place the watch on its charging dock and connect it to your computer/tablet via a cable. Copy the extracted map file folder to the "Map" directory on the watch to import the maps.
Maintenance
Watch Wear and Care Tips
Proper care ensures the longevity and performance of your KOSPET TANK M4.
Cleaning and Maintenance After Water Activities
After swimming or surfing, shake the watch to remove residual water from holes. Wipe the watch body and strap with a soft, clean, damp cloth. Allow them to dry completely before wearing to prevent salt deposits.
Cleaning Tips After Workouts
After intense activities, rinse the watch with clean water and dry it promptly to minimize corrosion from sweat and acidic residues.
Cleaning Precautions
Do not use soap, hand sanitizer, shampoo, or other harsh chemicals to clean the watch, as this can cause skin irritation or component damage. Device defects or damage from improper cleaning or chemical exposure are not covered under warranty.
Usage Environment Precautions
To maintain water resistance, avoid exposing the watch to:
- High-temperature environments (e.g., saunas, hot showers).
- Strong corrosive liquids or UV/radiation exposure.
Note: Prolonged exposure to extreme conditions accelerates gasket deterioration, which may lead to water ingress.
Troubleshooting
If you encounter issues with your KOSPET TANK M4, try the following solutions:
- Watch not turning on: Ensure the watch is fully charged. Connect it to the magnetic charging dock and check if the charging indicator appears.
- Cannot pair with phone: Make sure Bluetooth is enabled on both your watch and phone. Ensure the Apexmove App is open and you are following the correct pairing steps (QR code or manual selection). Try restarting both devices.
- BT Calling not working: Confirm that BT calling is enabled in the Apexmove App after pairing. Check your phone's Bluetooth settings to ensure the watch is connected for calls.
- Inaccurate health data: Ensure the watch is worn snugly on your wrist, not too tight or too loose. Clean the heart rate sensor regularly. Avoid extreme movements during measurements.
- GPS signal issues: Ensure you are in an open area with a clear view of the sky. Allow the watch sufficient time to acquire a GPS signal. For offline maps, ensure maps are correctly imported to the "Map" directory on the watch.
- Water ingress: If you suspect water has entered the watch, immediately power it off and contact customer support. Avoid wearing it in saunas or hot showers, as steam can compromise seals.
- App not syncing data: Check your phone's internet connection. Ensure the Apexmove App has all necessary permissions granted in your phone's settings.
Specifications
Key technical specifications for the KOSPET TANK M4 Smart Watch:
| Feature | Specification |
|---|---|
| Model | TANK M4 |
| Display Size | 1.96 inches |
| Resolution | 410*502 pixels |
| Screen Material | AMOLED |
| Peak Brightness | Up to 1,000 nits |
| Cover Glass | Corning Gorilla Glass 3 |
| Body Material | Bezel: Stainless Steel, Case: Stainless Steel, Back panel: Stainless Steel |
| Dimensions (without sensor base) | 50.5*42.5*13mm |
| Weight | 80g |
| Waterproof Grade | 10ATM & IP69K Waterproof (100m & up) |
| CPU Model | ATS3089 |
| System | Watch OS |
| RAM | <128MB |
| ROM | 32 GB |
| Bluetooth Version | 5.3 |
| Battery Capacity | 500mAh (Pure cobalt battery) |
| Typical Use Battery Life | Up to 14-15 days |
| Heavy Use Battery Life | Up to 9-10 days |
| AOD Mode Battery Life | Up to 5-6 days |
| Continuous GPS Usage Battery Life | Up to 21-22 hours |
| Theoretical Charging Duration | Approx. 2 hours |
| Health Sensors | VC9213-4PD sensor (supports blood-oxygen) |
| Movement Sensors | 6-axis gyroscope sensor, Geomagnetic sensor, Barometric altimeter, Ambient light sensor, Temperature sensor |
| Positioning | Dual-band, 6 satellite positioning systems (BeiDou, GPS, GLONASS, GALILEO, QZSS, NavIC) |
| App Name | Apexmove App |
| System Requirements | Android 7.0 and above, iOS 14.0 and above |
| Supported Languages | English, 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 |
| Sports Modes | 183 (including 23 ApexMotion sports modes and 160 Freestyle training modes) |
| Dive Modes | 3 (Freedive, Scuba dive, Gauge) |
| Sync to 3rd Party Fitness Apps | iOS: Apple Health, Strava; Android: Samsung Health, Google Fit, Strava |
| 24H Monitoring | Heart rate, Blood oxygen saturation, Stress level, Mood |
| Other Health Features | Menstrual cycle tracking, Breathing exercise |
| Connectivity | BT V5.3, Mic, Speaker, Motor |
| Other Features | Walkie-talkie, Offline Maps, Real-time Navigation, Compass, Barometric Altimeter, BT Phone Music/Camera Control, Notifications, Voice Assistant, Timers, Stopwatch, Alarm, World Clock, Music Storage, Do Not Disturb, Sedentary Reminder, Calculator, Flashlight, Screen Lock & Password |
Technical Specifications (Radio Frequency)
| Model | Frequency | Power (EIRP) |
|---|---|---|
| T4 | 2402-2480MHz (BeiDou, GPS, GLONASS, GALILEO, QZSS, NavIC) | BT: 2.02 dBm, BLE: 1.93 dBm |
| M4 | 2402-2480MHz (BeiDou, GPS, GLONASS, GALILEO, QZSS, NavIC) | BT: 3.23 dBm, BLE: 3.13 dBm |
Warranty and Support
Warranty Policy
For products purchased from the KOSPET official online store, please visit the official warranty policy page: https://kospet.com/pages/warranty-policy.
If you have further questions, you can contact KOSPET support:
- Email: support@kospet.com
- Phone: +1 (507) 668-8466 (Monday to Friday, 9:00 AM โ 6:00 PM EST)
For purchases made on Amazon, please contact: smartwatch.amz@gmail.com.
A detailed user manual in PDF format is also available for download: KOSPET TANK T4/M4 User Manual (PDF).
Safety Precautions
- Do not expose the watch to high temperatures or place it near heat sources (heaters, ovens, microwaves, water heaters) to prevent battery explosion.
- This product uses a non-removable polymer battery. Disassembly by unauthorized personnel is strictly prohibited.
- While the watch is waterproof, wear and tear can affect its sealing. Use caution when swimming or diving, and avoid saunas or hot showers.
- This product is not a professional medical device and should not be used for medical diagnosis or treatment. All health detection results are for reference only.
FCC Radiation Exposure Statement
This equipment complies with FCC radiation exposure limits set forth for an uncontrolled environment.
FCC Caution
Any changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment. This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) This device must accept any interference received, including interference that may cause undesired operation.
User Tips
- Language Support: The KOSPET TANK M4 supports a wide range of languages, including Hebrew. Check the watch settings or the Apexmove App to switch to your preferred language.
- Originality: The product is confirmed to be original.





