Features: WIDE RANGE OF USE You can use this remote control to swipe short video software, take pictures with your mobile phone, read novels, read comics, and more. RING-SHAPE: Ring-style design, small size, light weight, easy to wear on the finger, ergonomic design, will not fall off, use will not be tired. Premium: The video controller adopts plastic, which is safe and skin-friendly, ergonomic ring design, and comfortable and beautiful to wear. When remote control is used with a mobile phone or other BT device for the first time, it must be connected first. Say goodbye to sore hands and cramped fingers: Our Multifunction Vibrating remote control truly lets you release both hands and enjoy your favorite medias in comfort. Notice: 1. Actual color may be slightly different from the image due to different light effects. 2. Please allow 1-3 cm deviation due to manual measurement. Size: 3.7x8x3.3 cm BT Version: 5.3 BT Transmission Distance: 15 m Charging Interface: Type-C Input Current: DC5V Battery: 30mAh