a6 tws 5.0 in-ear wireless bluetooth earphones sports earbuds gaming head-phone for all smart phone

basic parameters :.product model: air twins a6.charging voltage: 5v-500mah.bluetooth version: v5.0.charging capacity: 300hah.transmission distance: 10m.play time: 3-4 hours.working voltage: 3.1v-4.2v.charging time: about 1 hour.headphone battery: 50mah.standby time: 100 hours.talk time: 3.5 hours.bluetooth protocol: hsp/hfp/a2dp/avrcp.storage box battery: 3.7v/300mah can charge the headset more than 2 times.intelligent noise reduction: yes.pairing method 1:.1. open the package and put the left a