It enables you to choose the headset style you want, and then choose the device connector type you need, such as a modular connector for desk phones or a USB or dual 2.5mm connector for computers. The Mairdi Quick Disconnect (QD) is a proprietary connector featured on （QD） series headsets. A QD connection also enables you to place a call on hold by simply disconnecting the headset at the QD during a call. It enables you to walk away from the telephone without having to remove the headset.