BlueFire Pro Trucker Wireless Headset with Microphone for Truck Driver, Phones, Skype, Call Center, Office Specifications: Weight: 45gSize: 16*15*6cmBattery Capacity: 180mAWorking Voltage: 3.3-4.2VTalking Time: Up to 13 hours Standby Time: Up to 220 hoursCharging Time: about 2 hoursMicrophone Sensitivity: -45dBWorking Range: Up to 10 metersWireless Version: V2.1Frequency Band: 2402MHz-2480MHzSupporting Profile: Headset and Hands-free Noise Canceling Wireless Headset Wireless Headset with Noise Cancelling Mic BlueFire Wireless Headset enabled advanced noise-suppression microphone and Wireless A2DP Technology, which can pick up your voice exactly and block the noise from the surround, ensure your crystal-clear conversations even in noisy environment. Easy Pairing & Wireless Freedom This Wireless headset can pair with any Wireless -enabled devices, include android and IOS devices(iPhone, iPad, Android smart phones, etc.) within 33 feet. It can also pairs with 2 Wireless devices at the same time, so you will never miss a call. Perfect for truck drivers, skype meetings and call centers. Charges Fast and Lasts Long Wireless headset can offer up to 13 hours continuous talking time and 200 hours standby time with single fully charged in just 2 hours; Charging easily, just charge it with a micro USB cable. Mute function When you want to block your voice during the chat, just rotate the boom mic upward to be parallel to the head band. Lightweight and Comfortable This headset is very lightweight and comfortable, brings no burden to your ears, so you can focus on your talk and music. Hands-Free Calling for Truck Driver Pair your smartphone or other wireless -enabled device to this wireless headset, and keep your hands free.