This musical baby mobile is a perfect gift for a newborn with 35 songs to play. You can attach the music mobile to the baby's bed using arms or fasteners and then hang toys on the hook. Compatible with soothing the baby to fall asleep easier. Awakens and develops children's interest. Compatible with learning more things. You can download audio stories or songs to this music box via USB cable. The bottom hook rotates while music plays, allowing you to hang sound toys in the bed. 2*AA batteries are not included. USB input DC5V100mA. Product weight: 100g 3.53oz. Product size: 140*90*37mm 5.51*3.54*1.46 inches. Compatible with packing weight 156g 5.50oz. Compatible with packing size: 150*103*40mm 5.91*4.06*1.57 inches. Note: 1. Please allow a 1-1/2 inch error due to manual measurement, thank you for your understanding. 2. The color of the product may have a slight deviation due to different shooting light and screen display. 3. Read the user manual to learn the function buttons before use. 4. Replace the battery when the power is insufficient, otherwise it will cause noise due to power shortage. Packing list: 1 * Music box 1 * USB cable 2 * User manual