Motorola 1884 Push-to-Talk Button and Headset with Boom Microphone Bundle (Black) The bundle consists of two pieces: A VOX headset (Model 56320) and a large Push-to-Talk button with a 1.25 meter cord. The VOX headset with Boom microphone provides a comfortable fit and can be used independently of the PTT button. The PTT button can also be used with the 53725 Motorola Talkabout VOX Headset. The PTT button is oversized with a good tactile feel providing an excellent alternative, even while wearing gloves. Compatible with T9680, MR, MH, MD, MT, MS, FV, MU, MJ series radios.