Product Description From Shure:
Models WL183, WL184 and WL185 are lavalier electret condenser microphones designed for use with a wireless body-pack transmitter. Each microphone has a 1.2 meter (4 ft.) cable terminated with a miniature 4-pin mini connector. The furnished tie clip can be rotated in 90 degree intervals for placement flexibility.
WL183 (Omnidirectional): Recommended for general purpose sound reinforcement, recording, or remote monitoring applications. Low handling noise. Pickup angle is 360 degrees.