Specifications:The wireless earphone adopts bluetooth-compatible 5.0, which supports automatic pairing.With smart touch operation, it is convenient to use.With built-in noise reduction IC, it provides high clarity call.You can use just one earphone or two with HiFi sound.Item Name: Wireless EarphoneMaterial: ABSModel: M8Bluetooth Version: 5.0Transmission Protocols: HFP 1.7, HSP 1.2, A2DP 1, AVRCP1.6, SPP 1.2, PBAP 1.0Charging Box Battery Capacity: 2200mAh (Included)Earphone Battery Capacity: 40mAh (Included)Charging Voltage: DC 5VMicrophone Sensitivity: -42DbWorking Temperature: -10-50 Degree CelsiusFrequency Response Range: 20-20000HzSensitivity: 120dB +/- 5dBTransmission Distance: 10mCharging Time: about 1 HourBattery Standby Time: about 180 HoursFeatures: Rechargeable, Stable Connection, Smart TouchCharging Box Size: 8cm x 5.5cm x 2.7cm/3.15" x 2.17" X 1.06" (Approx,)Notes:Due to the light and screen setting difference, the item& 39;s color may be slightly different from the pictures.Please allow slight dimension difference due to different manual measurement.Package Includes:2 x Wireless Earphones1 x Charging Box1 x USB Charging Cable1 x User Manual