Our Stereo Safari Mobile celebration of movement, light and soothing melodies calms baby and develops baby"s senses, cognitive skills and emotional intelligence. Easy attachment mechanism fits most cribs. Features: ?two speaker sound system ?27 minutes of non-repeating classical melodies ?7 classical soothing melodies and nature sounds ?detachable take-along baby stereo player ?amazing, colorful light show ?light, mute & movement control ?sturdy design and structure ?easy 3 step assembly