Projection angle is adjustable (head can move). Two timer modes (45min, 90min). Star speed and brightness are adjustable. Nebula change speed and brightness are adjustable. 9 nebula color modes are available. Nebulae and stars can be used together or separately. Bluetooth connection for music playback. 8 white noise modes. Rated voltage: 5V/2A Rated power: 10W Power supply: USB plug-in Standard package includes: 1 extravehicular activity (EVA) projector lamp, 1 hatch lower shell, 1 remote control, 1 power cord, 1 sticker, 1 instruction manual, 1 certificate of conformity.