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 the baby fall asleep more easily. Cultivate and develop children's interest in learning more new things. You can download audio stories or songs to this music box via USB cable. The bottom hook rotates while the music plays so you can hang sounding toys in the bed. : 2*AA batteries not included USB input DC5V100mAIP Item weight: 100g 3.53 ounces Item 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 1-10mm error due to manual measurement, thank you for your understanding 2. Item color may show 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 will occur due to power shortage. Package list: 1 * Music box 1 * USB cable 2 * User manual