The Bluetooth Headset VH310's 3 different earpiece sizes and 2 removable ear hooks guarantee a custom fit. Stylish, lightweight and ergonomic hands-free design. And you can leave the Bluetooth Headset VH310 on for more than 20 days before it needs to be recharged. Now that's wireless freedom you can count on!. Specifications: Bluetooth Version 2.0 + EDR.