1.PROJECTION FUNCTION: Astronaut projector star light has a projection function, it can project the beautiful stars on the ceiling and walls, colorful and interesting.2.MUSIC FUNCTION: Astronaut projector star lamp has a music function, you can project the beautiful stars while playing music to bring out the romantic feeling.3.BUILT IN BATTERY: Astronaut star projector has a built in 1200mAh battery, no need to charge when using, and you can move freely without the ties of charging cables.4.USB CHARGING: Astronaut star projection light can be charged via USB, but please note that it is powered by 5V 1A, please do not use a power adapter larger than this to charge it.5.SLIDE FILM REPLACEABLE: Only four steps are needed to quickly install the projection lamp film, first unscrew the soft cover, then uncover the slide and replace it with a new one, easy to operate without wasting time.