Marsway(TM) Romantic USB Lamp Rotary Flashing Starry Star Moon Sky Cosmos Night Light Projector (Blue) Projects a night sky of moon and stars on your ceiling or walls Illuminates for a calming and romantic nightlight effect Rotates at 360-degree , provides a fantastic moving starry sky The effect of night starry sky gets better in a darker room To get a longer service life of the lamp, please don't use batteries and USB power at the same time