Specifications:
Switch Type: 3 Push-Button
Voltage: DC 5V
Baby Projector Light's Size: 5.1x 5.1 x 5.2 inches
Weight: 0.66lb

Operation Manual of the projecting lights:
There are 3 buttons on the front A, B and C.
Button A: Switches on the control for "night light." This provides a fairly dim, warm lighting that would be great for sleeping with. Pressing it once turns it on & pressing it again turns it off.
Button B: Switches through the varying color options. There are a slew of different color options, which is great, it allows for a degree of personalization as you can choose the color scheme that you like the best.
Button C: Allows you to switch on the rotation, which makes the product more fun.

3 ways to power to Star Projector Night Lamp:
1.Power Constellation Night Lamp with a USB port into a adapter
2.Power Rotating Cosmos Star Projector Light with a USB plug to computer.
3.Power Moon Star Sky Projector Light with 4 AAA batteries (Not included).

Multifunction
"Project" the stars and moon spinning on the ceiling and wall, rotates as the stars light up.
"Non-Project" by putting the cover on and make it a night light or regular lamp.
Perfect gift for a child's bedroom or anywhere else you'd like colorful projected stars like decorating wedding, birthday and parties.

Note:
1. This night light device comes with a cover. Please don't forget you need to take the cover off to use it/see the stars.
2. The stars can rotate with mode 3 but will make slight white noise. It's not a good idea to rotate it in the very quiet midnight.
Please note that the USB Cable and the Batteries cannot be used at the same time.