WIRELESS FREEDOM, MADE SIMPLE. The ideal entry-level wireless microphone system for small venues. BLX Wireless Systems provide professional-quality sound with simple setup and an intuitive interface. Choose from a wide range of transmitter form factors (handheld, bodypack, headworn, lavalier, instrument clip-on) and use it with single- and dual-channel, as well as rack-mounted receivers. RACK MOUNT HARDWARE INCLUDES - 1x rack mount bracket, 1x long rack mount bracket, 1x link bracket, 1x thread adapter, 2x quarter wave antennas, 2x BNC bulkhead adapters, 1x zippered vinyl bag, 2x 22-inch BNC cables, and 1x hardware kit which contains 8x flat head #6-32 screws to secure the rack ears to the BLX4R, 4x pan head #10-32 screws to secure the BLX4R to the rack, and 2x plastic plugs to cover the antenna holes in the rack ears.