Dhikr Ring

Product information:
Model: E0120
Input signal voltage: 1.5 (V)                                                                                                    Bluetooth: Bluetooth 5.1
Matching Systems: Android 5.1 or iOS 10.0 or later
Screen: OLED,0.49 inch,72*40 
Battery capacity: 40mAh (3 days without charging)
Material: Plastic
Size: 20mm