Features:[Music Box] Can play soothing music through TF card or mobile phone via BT wireless connection, helping baby drift to dreamland quickly and deeply. [Rotation Mode] Designed for hanging on the baby crib and hanging some bed ringing toys, it will rotate when music is playing, which can greatly sooth the baby.[2 Power Supply Mode] 2 AA batteries (not included) or USB power supply, both are convenient and quick to use.[Micro USB Port] You can download more soothing music for your kids freely via the included USB cable.[Premium Material] Made from high-quality ABS material, no chemical smell, secure to use and let baby to play.Specifications:Color: White Material: ABSPower Supply: 2 AA batteries (not included)USB Input: DC 5V Power: 1W (music playing mode)Sound to Noise Ratio: 70dBProduct Size: 14 9 3.7cm/ 5.5 3.5 1.4inchProduct Weight: 140g/ 4.9ozPackage Size: 16 11 4cm/ 6.2 4.3 1.5inchPackage Weight: 170g/ 5.9ozPackage List:1 Baby Musical Crib Mobile1 USB Cable