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 tiring. Premium: The video controller adopts plastic, which is safe and skin-friendly, ergonomic ring design, and comfortable and beautiful to wear. When the 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 media in comfort. Notice Actual color may be slightly different from the image due to different lighting effects. Please allow 1-3 cm 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 Include:1X Remote Control Rings