Fingertip Control APP Scrolling Ring Bluetooth Technology Wireless Controller E-Reader Control

Label:Yes BT version: BT5.3 Transmission frequency: 24-24835GHz Color: Black/White/Pink Brand new and high quality Working temperature: 0-50 ° C Communication distance: in 10 meters Applicable system: holding iOS 15.0/Android 8.0 or above Material: ABS Size: 32×29×21mm(1.26×1.14×0.83in)

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.