Description: New mini-wave projection lamps Also a small speaker、 display music with 3.5mm audio connectionPower by 4 AA batteries、 also supports external USB and 4.5V DC plug.Automatic sleep function、 an hour later automatically closedDimension: 13.5cm x 13.5cm x 12.5cm. Package inlcude : 1 x Ocean Projector1 x 3.5mm Audio Cable1 x USB Cable1 x AC Adapter