BlackBerry HS700 Wireless Bluetooth Headset - Retail Packaging - Black Bluetooth 2.1 for simplified pairing Dedicated on/off switch 200 hours standby time, 4.5 hours talk time Advanced noise-cancellation technology Audible voice prompts Headset has advanced noise cancellation technology Headset supports voice commands, which allows user to dial, answer, and mute calls. Headset offers voice prompts for GPS turn-by-turn directions