With up to 5 hours of continuous use per charge, and an extended wireless range of 50', this is the one headset that gives you the freedom to move around effortlessly. Weighing in at just under 1 oz, you can concentrate in comfort, the dome shaped sound chambers are designed to provide hours of total comfort while transcribing or dictating. Stay Connected, Need to connect your computer, smartphone or your tablet? No Problem. The SP-300BT connects to any Bluetooth ready device. A Bluetooth 4.0 USB adapter is included just in case your computer doesn't have Bluetooth. You can connect it to PC's running Microsoft Windows 7, 8 and 10 that are NOT Bluetooth ready