【Compatibility】The silicone ring cover compatible with Oura Ring Gen 4/4 Ceramic, Oura Ring Gen 3 Horizon/Heritage. It is available in a variety of sizes. Please choose S for size 4/5/6/7, M for size 8/9/10/11, L for 12/13/14/15. (Note: Ring is NOT included)

Battery compatibility: This battery is a replacement battery for BOBOVR B100 , compatible with the new S3 Pro headband and E3 Pro headband & P4U (not compatible with the M2/M3 series headband).

12.5' HDTV supports up to 1080p with Dual Tuners ATSC and NTSC

Built-in ATSC Tuner for Free Channels: Rywob portable television has built-in ATSC tuner, you can access more free channels anywhere. Our TV works in all ATSC countries

Compatible Models: BandRain ring cover is specifically designed for Oura Ring 4, Oura Ring 4 Ceramic, Oura Ring 3, ULTRAHUMAN Ring Air, RingConn Gen 3, RingConn Gen 2, RingConn Gen 2 Air, keep a snug fit even during workouts, showers or sleep - no slipping or readjusting. (NOT included ring)

【App Remote Control】RODOT Switch transmits data to a cloud platform through the Wi-Fi Router, which enables you to remotely control the connected appliances, via free Smart Life or TUYA Smart App.You can download the iOS version in App Store and the Android version in Google Play.The App Smart Life enables you to control your devices easily .