Wireless Design APP Scrolling Ring Bluetooth Technology Camera Shutter Smart Ring E-Reader Control

Label:Yes Working temperature: 0-50 ° C Size: 32×29×21mm(1.26×1.14×0.83in) Communication distance: in 10 meters BT version: BT5.3 Brand new and high quality Material: ABS Color: Black/White/Pink Transmission frequency: 24-24835GHz Applicable system: holding iOS 15.0/Android 8.0 or above Package Included: 1×APP Scrolling Ring(with charging cable) Note: 1. There is a 2-3% difference according to manual measurement. Please check the size carefully before you buy the item. 2. Please note that a slight color difference should be acceptable due to the light and screen.