PC, smartphone and tablet headset: Easy to connect and switch between devices Rich digital stereo sound.40 ft. wireless range: Listen and chat up to 12 m from your PC-or pair with your smartphone or tablet using Bluetooth. Input impedance: 32 Ohms Six-hour rechargeable battery : Listen and chat longer with easy USB charging. Frequency response (Headset): Wideband: 30Hz to 15KHz, Narrowband: 40Hz to 3.2KHz. Frequency response (Microphone): 100Hz to 6,500Hz Padded comfort: Adjustable padded headband and sculpted ear cups for a feel-good fit NO DONGLE; If you have Bluetooth you don't need it.