Flexible earpiece PY-29 (detachable) 2.5mm connection for earpiece. Robust lapel PTT (Push-to-Talk). Curly cable. Water-resistant (IP54) Rotating metal clip. K1 connector. Size: 35.3 x 26 x 26 mm. Element type: Non-directional electric condenser Sensitivity: -38dB Output impedance: 2KΩ