It usually has these features:
RGB colorful galaxy/star light projection
Controllable via Remote control
Separate ON/OFF for LED light + Laser light
Various color modes (Red, Green, Blue, White mix)
Flash / Fade effect mode
Brightness increase/decrease
Music control button (some models have sound sync)
1H / 2H auto timer
USB powered
Moving star effect on room ceiling and walls
Can be used for parties, bedrooms, gaming setups, or as a night lamp
What you see on your remote:
LED button
LASER button
R/G/B/W color select
S+ / S- speed control
FADE mode
1H / 2H timer
Music button
Meaning, it is a decorative star projector light.