Usage Tips:This musical baby mobile is a perfect gift for a born with 35 songs to play. You can fix this musical mobile on the baby's bed with arms or brackets, then hang toys on the hook of the musical mobile to help calm the child. to sleep easily. Cultivate and develop children's interests to learn more things. You can download audio stories or songs into this music box via USB cable. The bottom hook rotates while playing music so you can hang sounding toys in bed. : 2*AA batteries not includedUSB input DC5V100mAIPitem weight: 100g 3.53 ounceItem Size: 140*90*37mm 5.51*3.54*1.46inch Package Weight 156g 5.50oz Package Size: 150*103*40mm 5.91*4.06*1.57inch Notes: 1. Please allow 110mm error due to manual measurement, thank you for your understanding 2. Item color may have slight aberration due to different shooting light and monitor display.3. Please read the manual to know the function buttons before use.4. Please replace the battery when the power is insufficient, otherwise there will be noise caused by electricity shortage.Package List: 1 * Music Box1 * USB Cable2 * User Manual