Specification:Additional InfoBrand: MicrolabModel: ANC H10Bluetooth Version: V5.3Charging Time: 1.5 hoursTalk Time: About 3.5 hoursListening Time: about 6-8 hoursHeadphone Battery: 500mAh (plus protection board)Input Sensitivity: 400mVStandby Time: 4 MonthsSpeaker Diameter: 40mmSpeaker Impedance: 32 ohmSpeaker Sensitivity: 108db /-3dbFrequency Response:20-20KHzFrequency Range:87.5-108MHzInterface Type: USB Type-CMaster Volume ControlPackage Contents:ANC H10 1 pcUser manual 1 pcCharge cable 1 pc01-Year Brand Warranty