This accessory is a must-have accessory for selfie lovers. The Camera Ring Flash Fill-light lens attaches to your phone , camera and enhances your photo brightness, and color tones. Especially useful for making your skin look beautiful and healthy at night in your photos. NO need to install any APP. Easy to use, just need to put the fill-light clamp over the cell phone, then turn on the switch. It also can be used as a simple flashlight or a small emergency lamp.