The volume control has two settings and the unit has an in-built timer that ceases the star dispay after 45 minutes. Sounds are stopped after 15 minutes.
There are a choice of colours for the star projection; blue, green, or orange and the display alternates automatically or it can be set to show in just one colour. You can set it to play the music alone, just the star display, or both simultaneously.
It is battery operated and with good quality batteries it will continue to work for weeks before they need changing. Obviously this depends on how often it’s used and if the music and display are used at the same time then this requires more power. If you think it’s going to be used frequently then perhaps invest in some rechargeable batteries. You’ll not only save money in the long run but this is also better for the planet.
This star projector ships with an instruction manual. It requires 3 x AA/LR6 batteries and these are sold separately.
The unit is small and compact which makes it ideal for travel as it slips easily into suitcase.