The Plantronics MX153 allows you to carry out a conversation while on the go. The discrete short boom headset features the patented Flex Grip™ design that provides an exceptionally stable comfortable fit, and allows for one-handed placement in the ear. The flexible noise-canceling boom microphone lets you hear and be heard clearly in every environment, providing Plantronics' superior call clarity. Compatible with phones that support a 2.5mm jack.