UHF Wireless Performance: The MONO IEM System provide good monitor experience, avoiding interference by UHF wide audio signal transmission without latency. The Operation Range is about 264ft, in open space, line of sight Transmitter and Bodypack: Metal construction for transmitter to ensure usage, while bodypack are Relatively small and refined, with independent volume control, Pause, frequency adjustment function. A Metal clip on the back of bodypack for carrying use.It works perfectly in various sound-monitoring occasions, stage performance, DJ, speech, lecture, studio recording, exhibit, instruction, musician, singer, guitar, etc Eighty channels: Eighty channels for anti-interference use,bring the clear pure sound back when using. Eighty frequencies are divided into eight groups, Ten channels in each group, which makes it faster and easier to adjust between two not close frequencies Quality and technology : With advanced circuit design and upgrade chips to improves the signal-to-noise ratio, This in ear monitor system offers clear sound and high fidelity with no latency, while provide stable signals,too.(NOTE:If there are noise and static during usage, it may be caused by interference. Please change other frequencies and try again) What you get:1 x UHF wireless transmitter, 4 x Bodypack receiver, 4 x In-ear earbuds, 1 x Power adapter, 1 x Antenna, 2 x 6.5mm to 6.35mm cable, 1 x User Manual The MONO IEM System provide good monitor experience, avoiding interference by UHF wide audio signal transmission without latency. The Operation Range is about 164ft, in open space, line of sight.Great UHF Band: wireless in-ear monitor system create your personal or team's monitor system. uncompressed wireless signal transmission, low noise and latency. Provides smooth frequency response with any headphones