Plantronics PL-VOYAGER-835 Plantronics Voyager 835 Bluetooth Headset [CD] [Wireless Phone Accessory] - 1 Pack - Case - Carrier Packaging - Neutral (Discontinued by Manufacturer) Built-In Microphone Transmission Range Up to 33 Ft Headset Includes A Rechargeable Li-Ion Battery Which Provides 5 Hours Of Run Time & 168 Hours Of Standby Weight: 0.4 Oz