The Plantronics Explorer 500 Bluetooth headset delivers GSMA-certified HD Voice clarity to your calls and supports voice dialling and other smartphone voice controls. A power-saving hibernation mode keeps your headset charged longer and the USB charging strap keeps your headset within reach when secured to a bag. Connect the explorer 500 to the USB charging strap and loop it around your bag or key ring to keep your headset within easy reach. Select english as your language and youll hear important status notifications, like when its time to recharge, reconnect a lost connection, and more. In-line volume control. Water-resistant. Batteries required 1 x Li-Ion battery (included) .