Full Night of Peaceful Sleep: Equipped with a range of features, experience our exclusive 4-Point Noise Masking System, Twin-Seal ear tips with 3x stronger Passive Noise Blocking, sound masking, and Smart Volume Control to prevent unwanted noise. Ideal for Side Sleepers: Sleep A20 utilizes the combined efforts of soundcore’s Air Wing and 3D ergonomic design—wrapped in an ultra-soft material—for the added benefit of pressureless comfort, even when sleeping on your side. Ultra-Long Playtime: Sleep mode boasts 14 hours of battery life on a single charge, extended to 80 hours with the case. Bluetooth mode offers 10 hours of playtime, with an additional 55 hours via the charging case. Peacefully Stream Content via Bluetooth: Curate your sleep soundtrack with a stable Bluetooth 5.3 connection and a customizable white noise library to compose a perfect night's sleep. Sleep Analytics for Better Sleep: Using a MEMS sensor, Sleep A20 tracks sleeping positions and movement through the night. Coupled with a Real-Time Clock, enjoy precise sleep quality analysis and gain invaluable insight into your nocturnal habits.