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. The video controller adopts plastic, which is safe and skin-friendly, ergonomic rings design, and comfortable and beautiful to wear. The perfect gift for his birthday, valentines and more. 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 and light effect 2.Please allow 1-3cm deviation due to manual measurement Description: Product size: 25*25*36mm Battery life: about 10 hours