Specification: 72×38×30mm Working voltage: 3.3V-4.2V BT version: V5.0+EDR Battery capacity: 45mA/350mA Use time: 3-4 hours Standby time: about 60 hours Speaker type: titanium composite membrane Transmission range: 2.40GHz2.48GHz Sensitivity: 98+3dB Communication distance: effective distance 15 meters Ear way: obliquely into the ear to fit the contour of the ear.
Package list: 2xEarplugs(R/L) 1xPortable Charging Case 1xcharging cable