Coros APEX 4 - 42mm

The APEX 4 offers best-in-class battery life. In standard watch mode, it can last for weeks. In full GPS mode, it provides extended usage suitable for multi-day adventures, though specific hours vary based on GPS mode and settings.

Yes, the APEX 4 is designed for water activities and has a water rating suitable for swimming, snorkeling, and other water sports. Remember to rinse with fresh water and dry thoroughly after exposure to salt water or chlorine.

Yes, the COROS app allows for extensive customization of watch faces and the data fields displayed during activities to suit your preferences and training needs.

Firmware updates are typically delivered via the COROS app. When an update is available, you will be prompted to sync your watch to download and install the new firmware.

COROS typically offers a standard warranty period for their products. Please refer to the official COROS website or your purchase documentation for the specific warranty details applicable to the APEX 4 in your region.

The COROS APEX 4 does not feature onboard music storage or playback capabilities. Its focus is on performance tracking, navigation, and battery life.

The APEX 4 uses a dual-range barometer for vertical accuracy, which is crucial for alpine terrain. For the most accurate altitude readings, it's recommended to calibrate the altimeter regularly, especially after significant elevation changes or long periods without use.

Ensure Bluetooth is enabled on your phone and the watch is within range. Try restarting both your phone and the watch. Check if the COROS app needs an update.

Ensure the watch has a clear view of the sky. Update to the latest firmware for improved GPS performance. Perform a GPS reset through the watch settings if issues persist.

Make sure the watch is worn snugly on your wrist, about one finger's width above your wrist bone. Clean the sensors on the back of the watch. Avoid excessive hair or lotions under the sensor area.

Check for background activity or widgets that might be consuming power. Reduce screen brightness or set the display to always-on mode less frequently. Ensure GPS settings are optimized for your activity type.

Try restarting the watch by holding down the power button. If the issue persists, perform a factory reset via the watch's system settings (note: this will erase all data on the watch).