This musical baby mobile is a great gift for newborns, featuring 35 songs. It can be securely attached to a baby's crib using arms or brackets, with a hook to hang toys that help soothe the child to sleep. The rotating hook at the bottom moves while music plays, encouraging visual stimulation and helping develop a baby's interest in learning. o stories or songs can be downloaded to the music box via the included USB cable. Item requires 2 AA batteries (not included). USB input: DC5V 100mA Item weight: 100g (3.53 oz) Item dimensions: 140 x 90 x 37mm (5.51 x 3.54 x 1.46 in) Package weight: 156g (5.50 oz) Package dimensions: 150 x 103 x 40mm (5.91 x 4.06 x 1.57 in) Notes: 1. Please allow slight measurement deviations due to manual measurement. 2. Item color may vary slightly due to differences in lighting and monitor display. 3. Refer to the user manual to understand the function buttons before use. 4. Replace batteries when power is low to avoid noise caused by low voltage. Package includes: 1 x Music Box 1 x USB Cable 2 x User Manual