Features: 13cm of diameter palm-sized lamp cover E27 standard screw is compatible with most of bulb Support APP control, gently sliding to adjust brightness and color temperature With a triangle holder, simple installation, stable structure. APP Connection: Download the Mi Home APP on the Google Play or APP Store Create a Mi account then sign in. Install the bulb and turn-on the WiFi of your phone then connecting. The APP supports muti-language setting If APP connection fails, please open the APP setting and switch the region to China, then reconnect.