:: HONOR Watch 4 Specifications ::

=> Compatible with Android 9.0 or higher version ; iOS 11.0 or higher version

=> Supports Bluetooth Calling

=> Sreen Size: 1.75-inch, AMOLED color screen ; 

Resolution: 450 x 390 pixels, 340 PPI

=> Body Material: 6 series aluminum alloy middle-frame

=> Strap: Silicone Rubber

=> Memory: 4GB RAM

=> Dimensions: 45.3 mm × 39.1mm ×11.2 mm

=> Wrist Size: Black:150-200mm, Gold : 150-195mm, Width: 21.5mm

=> Weight: Approximately 32g (without the strap)

=> Buttons: one button, supports press and hold

=> Charging Port: Charging port with magnetic contacts

=> 5ATM Water Resistance

=> Connectivity: 
GPS: Supported
Bluetooth :2.4 GHz，BT5.2，Supports BLE/BR/EDR

=> Speaker: Supported

=> Microphone: Supported

=> Health Monitor: Stress, Sleep, SpO2, Heart Rate, Breathe monitor.

For more info: https://www.honor.com/global/wearables/honor-watch-4/