Multi-task effortlessly by talking on your phone while driving or working with the Cellet Universal Mono 3.5mm Hands-Free Headset with Boom Microphone. Featuring an adjustable headband and flexible boom microphone, the headset can accommodate various head sizes and desired angles. The headset can be worn in either the right or left ear and the comfortable ear speaker produces clear sound quality. The Cellet headset is universally compatible with any devices containing a 3.5mm headphone jack.