Av-jefe Tcm361-sh4 Professional Condenser Lavalier (Lapel) Mic for Shure Wireless Microphone Compatible with Shure Body-Pack Transmitter Models: T1, ULX1, UR1, PG1, PGX1, PGXD1, SLX1, BLX1, BLXD1. (Not Compatible with Mipro, Peavey, Beyer wireless microphone system) Polar Patte: Omnidirectional Operating Volt: 1~10V DC Battery Dimension: 6.5 X 21.5mm Frequency: 20 Hz ~ 20,000Hz