While the SHIELD Control Housing / PTT was designed in concert with the company's SHIELD In-the-Ear Communication headset, (see 'HEADSETS' section of website for details) the PTT is also compatible with the company's ComTac V and VI urban headsets as well as our maritime Below H20 headset. The SHIELD PTT is manufactured of polycarbonate / ABS with a black TPE over-mold. It's overall ergonomic size measurements are 4.39" x 2.67" x 1.18". The rear side features a blackened, steel, adjustable MOLLE clip for mounting to a load bearing equipment vest.