Headset: it is equipped with a standard one-fourth-inch stereo headphone, stereo headphone jack below the elbow, when when you use the machine. Mono headset will not work. Using a headset can increase battery life and prevents bystander sound. It can clearly hear slight sound change, if not noisy area detection. For security purposes, do not use the earphones in traffic areas or hazardous area, such as the rattlesnake-infested place.