1.69-inch High-definition Six-color Electronic Ink Screen Anti-lost Device to Prevent Children and the Elderly From Getting Lost

Resolution:400*400
DPI:236
screen colour:6colurs
Outer dimension: 54*85.7*3.2mm
Weight：23.7g
Material:Tempered glass + aluminum alloy
Battery Li-On rechargeable :100mAh
Charging method:QI Standard Wireless Charging
BLUETOOTH 5.1 ,distance within 10meters