Black Jabra Wireless Headphones, 310 G

Connectivity Type - Wireless Color - Black Weight - 310 G Bluetooth Version - Version 4.0 Size/Dimension - 186x157x60.5 mm Battery Type - Rechargeable lithium ion battery 30-metre (100 feet) wireless range - Have the freedom to leave your desk while on a call. Wireless Bluetooth technology 1.5 gives you up to 30 meters /100 feet of hands-free connectivity to PC, smartphone and tablet. 12-hour battery life - Get up to 12 hours of talk-time on a single charge. Or simply connect the USB cable and charge while using the headset. Control of your workspace - Passive Noise Cancellation - Simply wear the headset to eliminate high-frequency noise, such as human voices – all thanks to the specially designed ear cushions. We call this "passive noise cancellation". Busy Light - The special "busy light" turns red to let people know when you're on the phone and keeps you from being interrupted. You can also turn it on manually when you don't want to be disturbed.