For restful sleep and comfort The Soundcore Sleep A20 is designed to give you a good night's sleep. With innovative features such as noise masking, ergonomic design and sleep analysis, they deliver a comprehensive solution for better sleep. Sleep well all night The 4-layer noise masking system and Twin Seal earbuds provide 3x more powerful passive noise blocking. Smart volume control helps to effectively reduce disturbing noises - for undisturbed sleep. Ideal for side sleepers The Sleep A20 combines the advantages of Soundcore Air Wings with an ergonomic 3D design. The soft material offers comfort without pressure, even when sleeping on your side. Long battery life In sleep mode, the Sleep A20 offers up to 14 hours of battery life with a single charge and up to 80 hours with the charging case. In Bluetooth mode, up to 10 hours of playback time is possible, supplemented by an additional 55 hours with the charging case.