Maximum LED power: 2* 4W Green laser: <1MW Power Input: USB DC5V / 2000mA Operating Temperature: 14℉ and 104℉(0℃ to 40℃) Projection Coverage: 161-538sq.ft(15-50㎡) Package list: 1 * Music Starry Projector 1 * Remote Controller(not included 2*AAA batteries) 1 * USB Cable 1 * User Manual How to use: 1,Indoor use, projecting in the sky direction.(or you can change the projection direction by offering it a base ) 2,Connect your phone to Bluetooth connection “BTK10” to play music. 3,Make sure the remote control is pointing at the infrared sensor. ✨【Work Smart Life App and Alexa】 Upgrade Version galaxy projector have two mode manual and wifi mode.our galaxy light projector supports smart Life App control .you can choose different lighting effects through your phone,and you can authorize Alexa to add the star projector to take control of the star projector via your voice. ✨【NO Distance Limitation, Control it ANYTIME, ANYWHERE】 GET the APP- Smart Life or Tuya Smart and turning the star projector to Wi-Fi mode. Click Lighting, and then Light Source (Wi-Fi) to add device. Enter Wi-Fi password to connect Wi-Fi (please attention: only 2.4 GHz Wi-Fi Network supported). Adding device, then DONE!