Function With remote control, automatic rotation, 400 nursery rhymes, lights and music, star projection function, time setting function. Quality assurance Sturdy and durable If you have any problems within three years of purchase, please contact us for a free replacement. Sound Volume controllable, soft music helps calm baby and reduce crying. Material Exquisite workmanship, ABS material is very safe (Requires three 1.5v AAA batteries not included). Installation Easy to install Suitable for crib rail width 1.6 inches. Function With remote control, automatic rotation, 400 nursery rhymes, lights and music, star projection function, time setting function. Quality assurance Sturdy and durable If you have any problems within three years of purchase, please contact us for a free replacement. Sound Volume controllable, soft music helps calm baby and reduce crying. Material Exquisite workmanship, ABS material is very safe (Requires three 1.5v AAA batteries not included). Installation Easy to install Suitable for crib rail width 1.6 inches.