Three Sheep Children Sleep Music Soothing White Noise Sleep Aid Instrument Description: 1. Size: 139 × 75 × 36 mm 2. Control method: mechanical 3. Product functions: (1) key sound selection, built-in 6 kinds of sound; (2) 3-level timer function;(3) Knob volume adjustment (4) Button recording function; Voice control function (5) Power supply mode: AA battery; (6) Contains back bracket and hook, which can be placed or hung. 4. Features: 1. Voice-activated induction function: With a unique voice-activated induction function, in standby mode, the baby can immediately recognize when it cries, play music to soothe the baby, so that parents less worry.2, 8 classic songs and a variety of sound effects: relaxed melody and a variety of peaceful nature sounds, let your baby sleep peacefully in different kind of nursery rhymes, soft natural sound effects and soothing music. 3. Free recording in 30 seconds. When the baby sleeps independently, it is easy for him to be uncomfortable in an unfamiliar environment. He is accustomed to the sense of security brought by his mother's soft whisper, just like the mother is around. 4. Hanging desktop use method: Can be hung on the side of the crib or placed on the table top, suitable for different usage habits. 5. Note: two AA batteries are required