Refurbished Jabra Cool Boom Headset The Jabra Cool Boom Mono Headset discreetly allows you to talk on the move, combining excellent audio performance with a compact, stylish design. It features an in-line microphone with a sturdy clothes clip to ensure the clarity of your voice transmissions, and Jabra MiniGels provide outstanding sound reception. Compatible With: Devices that use the standard 2.5mm jack. Type: Wired Headset Compatible Phone Manufacturer: Universal