Headphones ATH-SR30BT

HeadphonesTypeClosed-back dynamicDriver Diameter40mmFrequency Response5 – 35,000 HzSensitivity99 dB/mWImpedance32 ohmsBatteryDC 3.7V lithium polymer batteryBattery LifeContinuous transmission time (music playback): Max. approx. 70 hours*1WeightApprox. 193 g (6.8 oz)Charging TimeApprox. 4 hours*1Operating Temperature5°C to 40°C (41° F to 104°F)Microphone TypeElectret condenserMicrophone Sensitivity−44 dB(1V/Pa,at1kHz)Microphone Frequency Response100 – 10,000 HzMicrophone Polar PatternOmnidirectionalAccessories IncludedUSB charging cable (30 cm (12″) USB Type A / Micro USB Type B)Bluetooth®Bluetooth® VersionBluetooth version 5.0Operating RangeLine of sight – approx. 10 m (33′)