ITEM NAME:Bluetooth 5.0 Headset Wireless Earphone In-Ear Earbud Dual Headphone L1L7 T5O1 Product Description Specifications Earphones Bluetooth version5.0 + EDR Wireless frequency2.4GHz Supporting agreementA2DP1.3/HFP1.6/HSP1.2/AVRCP1.6/D11.3 Transmission distance10 meters Battery capacity50mAh Charging voltage/current5V/1A Play/talk timeAbout 4 hours Charging timeAbout 1 hour Standby time120 hours Speaker impedance32diameter 8mm/0.31inch Microphone sensitivity-42dB Working temperature-10 to 50 Gross weight3g*2 Charging case Input voltage/current5V/1A Gross weight69g Package Contains: 1*earphone.Bluetooth version5.0 + EDR. Microphone sensitivity-42dB. Wireless frequency2.4GHz. Charging case. Gross weight3g 2. Working temperature-10 to 50.