Jabra Evolve 65 TE UC Mono Wireless Bluetooth Headset w/ Charge Stand - Includes Link 380A Dongle - Speaker Size: 28mm - Frequency Range: 150Hz - 6800Hz - On-Ear Headband - Connectivity: Bluetooth, USB - Operating Range: Up to 30m - Battery Time: Up to 16 Hours Talk-Time, Up to 15 days Standby Time - Charge Time: Max. 120 minutes - 6693-833-499 · Long wireless range for up to 16 hours · Control of your workspace · Connectivity · At one with the universe (of phones and platforms) · Passive Noise Cancellation