This musical baby mobile is a perfect gift for a newborn with 35 songs to play. You can attach this musical mobile to the baby's bed with arms or fasteners and then hang toys on the hook of the musical mobile to help soothe the baby to sleep easily. Cultivate and develop children's interests in learning more new things. You can download audio stories or songs to this music box via USB cable. The bottom hook rotates while playing music so you can hang sounding toys in the bed. : 2*AA batteries not included USB input DC5V100mAIPitem weight: 100g 3.53 ounces Item size: 140*90*37mm 5.51*3.54*1.46 inches Package weight 156g 5.50oz Package size: 150*103*40mm 5.91*4.06*1.57 inches Notes: 1. Please allow 1-10mm error due to manual measurement, thank you for your understanding 2. Item color may have a slight aberration due to different shooting light and monitor display.3. Please read the user manual to know the function buttons before use.4. Replace the battery when the power is insufficient, otherwise noise caused by lack of electricity will occur. Package list: 1 * Music Box 1 * USB cable 2 * User Manual