1，This Fantastic Cosmos Planet Star Lamp is autorotate with music.2，Use at night and one 10-20 square meters room， it will show you the best effect.Material: ABS plasticSize: 120*90*90mmWeight: 300gQty: 1 pcCondition: Brand newPower by 3 x AA batteries or DC 5V Power input (Batteries and Power input is not included)Package size About 110mm x 110mm x120mm