Description: One button control easily to turn on / off, play / pause / music switch Hands free calling to drive, work, meeting, run. One to two connections, can be connected to two cell phones at the same time. Smart compatibility: support all bluetooth cell Mobile, tablet, notebook, qq music, movies, etc., universal all mobile phone. Specifications: 1. bluetooth version: v5.02. 2. bluetooth distance: 10m3. 3. charging time: about 1-2 hours 4. standby time: about 80 hours 5. music time: about 3 hours 6. talk time: about 4 hours 7. earphone battery: 45mah polymer lithium battery 8. battery box battery: 280mah polymer lithium battery 9. audio transmission format: hfp / a2dp / hsp / avrcp Package Includes: 1 x tws bluetooth headphones (left and right ears) 1x280mah charging box 1 x USB charging cable 1 x User Manual