ANKER SoundCore Sleep A20 Wireless Bluetooth Noise Reduction Sleeping Earphones 1. Bluetooth: 5.3 2. Codec: AAC, SBC 3. Operating time: 14-80 hours 4. Input: 5V 0.45A 5. Battery capacity: 580mAh 6. Charging port: Type-C 7. Packing list: earphone x 1, ear cap x 15 pairs, charging cable x 1 8. Weight: about 53g 9. Charging case size: about 10.8 x 5.6cm Features: 1. 360-degree skin-friendly soft package, side sleeping comfort zero pressure 2. Special design of the headset cavity, zero foreign body feeling naturally fit the ear contour, whether lying on the side, supine or prone, any sleeping position can be stable and not fall off 3. Double soundproof ear caps, wrapped airbag ear wings, noise wave, intelligent volume adjustment, four-pronged support, efficient noise masking snoring, people, air conditioning sound, traffic and other types of noise 4. Enhanced full-frequency noise masking technology, does not support the phone function, targeted shielding disturbances 5. Customized playback mode, intelligent sleep monitoring, private alarm clock settings 6. Headset localization, quick search 7. Intelligent noise detection and automatic volume adjustment, both noise masking and hearing protection 8. According to your sleep habits, customized settings for song playback and white noise switching 9. Bluetooth 5.3, stable and smooth connection to listen to your heart 10. High smoothness PU + small volume PET composite diaphragm, large dynamic performance, lossless audio reproduction, low-frequency surging clear, high-frequency delicate 11. Open the lid instantly connected to the phone, built-in intelligent Hall magnetic switch, easy to get started 12. Anti-touch + intelligent touch design, one-handed click to increase the volume cut the song pause, etc., easy to operate