Flexible PY-29 earbud (detachable). 2.5mm connection for earpiece. Robust lapel PTT with slider. Twisted cable. Water resistant (IP54). Rotating metal clip. K1 connector. Size: 35.3 x 26 x 26 mm. Type of element: Non-directional electric condenser Sensitivity: -38dB Output impedance: 2KΩ