Technical information:
-Display: 1.39 "rounded AMOLED touch screen, resolution 454 x 454 pixels, 326 ppi
-Weight: approx. 53 g (without wristband)
-Memory 4GB ROM, 32MB RAM
-Battery: battery life approx. 2 weeks
-GPS: yes
-Audio: built-in microphone and speaker
-Operating system compatibility: Android 5.0 or later, iOS 9.0 or later
-Heart rate measurement: yes, optical heart rate sensor
-Water resistance 5ATM rating (up to 50 meters)
-Bluetooth: BT 5.1, 2.4GHz, supports BLE, BR, EDR, portability max 150 meters without obstacles