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, etc. 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 rings 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 effect 2. Please allow 1-3cm deviation due to manual measurement Description: Material: ABS BT version: 5.3 Transmission frequency: 2.4GHz-2.4835GHz BT transmission distance: more than 6 meters Standby time: about 1 month Battery capacity: 50 mAh Input power: DC-5V Accessories: Data cable*1