Razer Hammerhead BT Wireless in-ear headset. Up to 8 hours of continuous listening enjoyment on a single charge. Boasting an amazing battery life of up to 8 hours, the Razer Hammerhead BT is made to deliver non-stop high performance. Now you can get through your day without any worries, from your morning commute to your evening lounges. The Razer Hammerhead BT has built-in Bluetooth 4.1, which utilizes the renowned aptX codec so there's no compromise on sound quality. Indulge in exceptional audio as you never have to deal with the hassle of cables. The Razer Hammerhead BT comes in a stylish neckband design with a detachable magnetic clip that secures the headset to your shirt and takes the weight off your shoulders. Stay in the zone and in tune comfortably all day long.