With skin-friendly foam pads and a flexible headband, it is comfortable to wear. It uses an advanced Bluetooth-compatible chip, ensuring fast speed and stable connection. With a noise-cancelling microphone, it has HD-compatible calls. It is made of ABS material with professional impedance, which can absorb and reflect sound waves, to reduce sound distortion and ensure clear communication even in noisy environments. The headband is slim and retractable, and the headset is looser. The length of the charging cable is 100cm. The outer diameter of the ear cup is 82mm, the outer diameter of the head bow is 173mm, and the diameter from the top of the head bow to the ear cup is 180mm. It is perfect for drivers, call centers, for Skype chat, teleconferences, webinar presentations, etc. It can connect two Bluetooth-compatible devices at the same time, and you can easily switch the use of headphones from one device to another. The microphone can be rotated 270 degrees, which means you can place it on either side of your head.Product Name: Wireless HeadsetMaterial: ABSSpeaker Type: 40mm/20mW/32ΩBuilt-in Battery Model: 602030Headphone Battery Capacity: 300mAh (included)Sensitivity: 108dB±3dBDurability: About 100 hoursTalk Time: 30 hoursCharging Time: About 3 hours, DC5V1A, Type-C fast chargingFrequency Response Range: 20-20kHzBluetooth-compatible Version: 5.0, compatible with Bluetooth-compatible 4.2, BR/EDRBluetooth-compatible Distance: 30mBluetooth-compatible Pairing Name: WirelessHeadsetCharging Cable: 100cm long, black round cable, USB Type-CMicrophone Type: Strong resistance, high sensitivity 3012-M4618L15, Impedance: 2.2kΩCompatible Protocol: A2DP/AVRCP/HSP/HFPCompatible System: for iOS/for Android/for Mac OS/for WindowsFeatures: Noise Reduction, Comfortable, Long DurabilitySize Details: Ear Cup Outer Diameter: 8.2cm/3.23\" (Approx.)Head Bow Outer Diameter: 17.3cm/6.81\" (Approx.)Top of Head Bow to Ear Cup Diameter: 18cm/7.09\" (Approx.)Charging Cable Length: 100cm/39.37\" (Approx.)Notes:Due to the light and screen setting difference, the item's color may be slightly different from the pictures.Please allow slight dimension difference due to different manual measurement.Package Includes:1 x Wireless Headset 1 x Charging Cable 1 x User Manual