Star Projector 3 in 1 Galaxy Projector Romantic Starry Night Light Projector with Bluetooth Speaker Nebula Cloud Ocean Wave Projector Star Light Projector for Kids Bedroom Game Room

Plug is not necessarily needed. You can easily turn on the projector by connecting it to a power bank.  Simulated Nebula Galaxy Rotation This galaxy projector was designed to provide an illusion of being surrounded by a floating galaxy. (or static) You can adjust the rotating speed simply just by pressing the button on the remote control.   Built-In Speaker This projector can be connected to your devices via Bluetooth/USB.  With the addition of the built-in speaker, you can also listen to your favorite music while enjoying the floating galaxy after a busy day at work.  Remote Control 1.Make sure the controller is pointing at the infrared sensor when using.  2.Maximum Remote Control Distance: 39ft/12m Important features:  1.Input: DC 5V/2A 2.LED RGBW: 2*3W 3.Music: via Bluetooth/USB 4.USB Input: Power bank, PCs, or AC adapter 5.Projection Range: 161 sq. ft-538 sq. ft Package Contents: 1*Star Projector 1*Remote Control (Battery not included)  1*USB Cable 1*User Manual