LISTEN ONLY D-SHAPE EARPIECE 11DZZ14MT1 45CM CABLE FITS MOTOROLA (MTH3) TETRA. Earpiece Shape: D-SHAPE. Surveillance One Wire D-Shape Earpiece. Mic & PTT: No Listen Only. Fits: Motorola MTH600, MTH650, MTH800, MTH850, MTP850, MTS850.
eBay