Wireless in Ear Monitor System, Quad-Channel Wireless IEM System, Metal IEM w/ 4 Bodypacks, 4×25 UHF Frequencies, Rack Mount, 164ft Range, Mono Deisgn, for Studio/Band (PTM-33). INGENIOUS INTEGRATED MONITOR STATION. The 4-channel wireless monitor provides 4 groups of left/right inputs and loop outputs, requiring only four auxiliary jacks on one audio mixer to satisfy diversified monitoring requirements for a four-member band. It allows you to flexibly daisy chain audio signals. Up to 4 standalone mixes and no delay in sound enable you to hear your own mix crystal-clearly. EXCEPTIONAL MONO MONITORING EXPERIENCE. The mono wireless in ear audio monitor system has 4×25 UHF frequencies to avoid interference. Enjoy a clutter-free stage to move freely with a 140-164ft interference-free range line of sight. Mono in-ear monitoring only, and you can easily focus on your content without delay, feedback or ambient noises. IR sync for quickly linking up as many receivers as you want. Please avoid thick walls, glass, and metal blocks for longer distances. The 42cm/16.5in studio audio monitor meets various monitoring needs, saving the rack space and making it easier to tour around. The widely-compatible 1/4 TS jack of the transmitter and the antenna rackmount kit included in the package facilitate your easy rackmount workflow. The UHF mono in ear monitor system works perfectly in sound-monitoring events for stage musicians, sound engineers, church bands, gig bands, MCs, etc. BOX CONTENTS: 1 x wireless IEM transmitter, 4 x UHF bodypack IEM receiver, 4 x in-ear earphone, 1 x power adapter, 2 x antenna, 1 x antenna rackmount kit, 1 x user manual, 8 x AA battery. Welcome for troubleshooting or replacement of discontinuous/defective parts.