Three-wire type headset; the length of the wire is about 39 inches from plug to mic (PTT button); and another 21 inches from the mic (PPT button) to the connection point of the black wire and the transparent tube; and the length of the transparent tube is about 14 inches. In total, the length from of the plug to the earbud is about 74 inches. The cord is long enough to keep your radio in your pocket or clip the radio to your belt | The microphone is located on the PTT button portion of the headset; it is a tiny hole in the front where the PTT button is. The mic has an alligator clip on the backside to be attached to a shirt collar, upper chest area, a vest, or a cuff securely to be used as a lavalier microphone or a palm mic. The cord from the mic to the earpiece is long enough to go over the shoulder and around | Press the PPT button to activate the mic to talk;not only can you press the button on the headset to talk,but you can also press the PPT button on your walkie-talkie and it still transmits your voice;the headsets work with VOX. K-type plug:3.5mm pin and 2.5mm pin in diameter. The pins go into the headphone jack and the mic jack on the radio; 3.5mm pin is for the mic jack;2.5mm pin is the for the headphone jack;11mm center to center distance of the 2 pins and 8mm inside gap between the 2 pins | Solid and light-weight piece of equipment; light-weight and soft plastic earbuds are easy and soft on the ears. It fits snugly and comfortablely; it’s comfortable to wear for long periods of time; very crispy clear and loud sound quality for both transmitting and receiving; one spare plastic earbud included; each headset weights about 40 gram | Great upgrade from standard earpiece for covert purposes; perfect for anyone working in the security industry. By using Secret Service style headsets, your security team will look very professional