XIANQI Features: 1.10 Meters Control Range The effective range of the remote control of this product is 10 meters, which realizes the freedom to take pictures. 2.Application Compatible with Systems below IOS13.4 and Android phone. 3. Rechargeable Battery Suitable for any charger with USB interface, dont need to face the problem of no battery. 4. Bluetooth 5.1 Adapt BT 5.1 technology, of which connection is stable and the speed is high. Ring design is not easy to drop, no need to install software. 5.Package Each pack age included 1 x Multifunctional Wearable Selfie Remote Shutter, 1 x Instruction. Notice: Actual color may be slightly different from the image due to different monitor and light effect. Please allow 1-3cm deviation due to manual measurement. Description: Bluetooth: 5.1 Material: environmentally friendly ABS plastic Battery: Built-in battery Inner diameter: 19.5/21.5/23.5mm Battery capacity: 30mAh Continuous working time: 8 hours Size: 25x23x35mm Connected standby time: 100 hours Remote control range: up to 10 meters Color/Style:As the picture shown includes: 1 x Wearable Selfie Remote Shutter