Awei T79 in-Ear Dual Bluetooth Handsfree Earphones

Bluetooth version: 5.3 (ad6973d4) channel: stereo supported protocols: a2dp, avctp, avdtp, avrcp, hfp music playback duration: 5 hours talk time: 4 hours earphone battery capacity: 30mah storage battery capacity: 500mah charging time: 2 hours speaker: 13mm standby duration: 300 hours speaker sensitivity: 114db±3db charging input standard: dc 5v bluetooth operating frequency: 2.402ghz-2.480ghz maximum transmission distance: 10m voice prompt: supported multi-device connection: not supported wearing style: in-ear / semi-in-ear