Shure SLX14/85 Lavalier Wireless System, H5 This wireless system operates on the H5 frequency band at 518 - 542 MHz. The SLX14/85 Lavalier Wireless System is part of the SLX wireless systems family and features the WL185 Lavalier Microphone. SLX Wireless Systems are powerful wireless tools that can be set up quickly and used confidently by installers and working bands. Features include auto frequency scan with transmitter setup, exceptional wireless clarity, and Shure patented Audio Reference Companding. Includes WL185 lavalier microphone, SLX1 bodypack transmitter, SLX4 receiver, tie clip, rackmount kit, two 1/4 wave antennas, power supply, 2 AA batteries, protective bumpers with 8 screws, vinyl bag, and user guide.