2019w Features: -Soft, lightweight, supportive and stretchy fabric band. -Requires no clips, velcro or adhesive to keep speakers in place. -High quality speakers are designed to keep total sound output to a level that is safe for baby.. -Easy to use- Just plug into any MP3 player/iPOD and press play. Product Type: -Fetal Audio Player. Use: -Prenantal. Dimensions: Overall Product Weight: -0.5 Pounds.