YK03 Smart Watch - Bluetooth Calling Rugged Smartwatch with Built-in Flashlight, Heart Rate & Blood Oxygen Monitoring

System requirements: Android 6.0 and above, iOS 10.0 and above, support Bluetooth 5.3

Bluetooth version: BLE 5.3 (low power consumption)

Bracelet memory: RAM_578KB+ROM_64Mb

Battery capacity: 300mAh_

Standby time: about 35 days