The model AT831cW is lavalier microphone, terminated with locking 4-pin connector for A-T UniPak® body-pack wireless transmitters. 55" (1.4 m) cable. Includes windscreen and clothing clip. For normal lavalier use, attach the microphone about 6" (15 cm) below the user’s chin. Anticipate movements that may cause the microphone to rub against or be covered by clothing and position the microphone to avoid it.