Support Mainstream APP: Selfie Ring Controller is designed to be your perfect photography companion no matter which app you prefer. With support for a variety of mainstream short video APP beauty camera and novel APP, it's easy to use with your favorite app. Bluetooth 5.1 Stable Connection: The Selfie Ring Controller features Bluetooth 5.1 technology, allowing a stable connection with your phone. 10m Remote Control and Thumb Up Remotely: The Selfie Ring Controller has a range of 10 meters, which means you can take perfect shots from a distance without having to worry about handshakes. Long Life: The built-in lithium battery of the Selfie Ring Controller is rechargeable, which means you can have a continuous working time of 8 hours. With a small battery and big energy, this controller offers low power consumption, ensuring long-lasting performance to keep you shooting for longer. Remote Control Use: Worn on the index finger, the Selfie Ring Controller is easy to use and allows you to take pictures quickly, conveniently, and accurately. With the thumb gently pressing to control the phone shutter, you can easily capture the perfect shot without any hassle.