Anker SoundCore Sleep A20 In-Ear Headphones, True Wireless, Bluetooth 5.3, Noise Blocking, 80H Battery Life, White A night full of peaceful sleep Equipped with a wide range of features, experience our exclusive 4-point noise masking system, Twin-Seal earplugs with three times stronger passive noise blocking, sound masking, and smart volume control to prevent unwanted noise. Comfort while sleeping 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 pressure-free comfort, even when sleeping on your side. Ultra-long playtime Sleep mode has 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. Bluetooth 5.3 Fix your sleep soundtrack with a stable Bluetooth 5.3 connection and a customizable white noise library to compose the perfect night's sleep. Sleep Analysis Using a G-sensor, Sleep A20 tracks your sleeping positions and movement throughout the night. Together with a real-time clock, enjoy accurate sleep quality analysis and gain invaluable insight into your night.