Smart ring: Get a Bluetooth smart ring. Battery: The 12-hour service life and 8-day standby time provides extended usage. It can quickly recharge within 1.5 hours with the magnetic charging cable (included). Features: Effortlessly navigate through videos and novels with this smart ring for a hands-free entertainment experience with up to 10 meters radius control. Connectivity: Pair and connect this ring to your phone via Bluetooth to relax as you flip through pages, change videos or switch music. Material: Stainless-steel. Design: The ergonomic design allows for all-day, comfortable wear and the touch buttons and LED indicators make using this smart ring super simple.