r3 tws bluetooth 5.1 wireless headphones noise reduction hifi call earphones touch control siri sports earbuds charge

product specification: 1.bluetooth specification:v5.1 2.bluetooth profile:a2dp,avrcp, hfp;hsp 3.working voltage:3.1v~4.2v 4.charging voltage:5v-1a 5.battery capacity of the headset: 50mah 6.battery capacity of the storage box:2000mah 7.transmission distance:>10m 8.call time:4-5h 9.play time:4-5h 10.waterprof :ipx7 11.charging time of headset:1h 12.charging time of the charging box:1-2h