Plantronics Voyager 510 Recertified Bluetooth Headset (Silver) Bluetooth headset refurbished to high-quality factory standards Multipoint technology allows you to seamlessly switch between two Bluetooth devices WindSmart technology enhances call clarity in windy environments One-touch call answer/end, last number redial and voice activated dialing (with compatible phones) Bluetooth 1.2 technology; up to 6 hours talk time and up to 100 hours standby time