1、APPLICABLE MODEL: Electric bluetooth smart scrolling ring is fit for IOS, fit for Android, fit for Harmony OS operating system with wide compatibility, providing great convenient for you. 2、REMOTE CONTROLLER: After wearing this ring controller, you will find it more convenient to read eBooks, watch videos, make movies, click likes and so on. 3、BLUETOOTH 5.3 STABLE CONNECTION: Turn on the Bluetooth for instant connection, easy pairing, and stable operation. One key fast forward and backward, adjust volume and brightness, play/pause as desired. 4、USB TYPE C CHARGING PORT: With low power consumption, long lifespan, independent charging, and a Type C fast charging cable, fingertip button ring is environmentally friendly and durable. 5、COMFORTABLE TO WEAR: Phone remote controller ring adopts ergonomic design, is mainly made of ABS material, very comfortable to wear for a long time. 6、PAGE TURNING: Suitable for most APP and web browsing, one press left and right button to turn pages easily, watch short videos etc., easy to like for your favourite short videos。 Item Type: Bluetooth Remote Control Page Turner Battery Capacity: 50mAh Battery Type: Lithium ion Battery(built in) Bluetooth Version: V5.3 Bluetooth Chip Usage Time: Approximately 48 hours Transmission Frequency: 2.4-2.4835GHz Product Size: Approx. 31.5 x 17.9 x 31mm / 1.2 x 0.7 x 1.2in Product Function: Selfie, Like, Page up/down/left/right, Volume +/- 1 x Controller 1 x USB Charging Cable 1 x Storage Box 1 x User Manual