Quality W1 Earphone-Tws Stereo Wireless Earbuds Bluetooth Headset Touch-Control Earphone Handsfree With Microphone Product features: Wireless binaural stereo, left and right auditory canal separation, hifi sound effect Left and right ears can be used separately (mono) and paired (stereo) Ergonomic, small size, easy to carry. Jerry 6959a Bluetooth solution, Bluetooth version 5.0, using 2.4GHz Bluetooth Special built-in 45 MAH rechargeable steel case Bluetooth distance: barrier straight line distance 10-20 meters, barrier 360 ° arbitrary angle 10 meters Endurance: ear can continuously listen to music and make phone calls for 5 hours, while both ears can listen to music for 3.5 hours; ear standby for 120 hours and both ears for 60 hours Charging: the battery is charged in the storage mode, and the battery will be fully charged within 60 minutes. The storage box has a built-in 300mAh battery, which can charge three times continuously. Built in high sensitivity (- 38dB) mic Built in cvc6.0 noise cancellation technology to provide quiet call effect Product parameters: Bluetooth version: Bluetooth 5.0 Operating distance: 10-20 meters in straight line, 10 meters in 360 degrees and 10 meters in any angle Bluetooth protocol: HSP / HFP / A2DP / AVRCP Frequency range: 20-24000hz Sensitivity: 105dB Microphone sensitivity: - 38dB Impedance: 32 Ω Net weight of headset: 5g With charging bin weight: 38g Package: 78g Headset size: 1.9 * 2.3 Charging bin size: 7.2 * 3.8 * 3.1cm Box size: 14.6 * 9.5 * 3.2cm Earplug battery capacity: 50mah Playing time: about 3.5 hours Battery capacity of charging box: 300mAh Products include: 1 x Bluetooth headset 2pc 1 x charging bin 1 x charging line