1、SUPERIOR PERFORMANCE: The wireless monitor system utilizes advanced digital signal processing technology to increase signal and eliminate reception blind spots. Enables users to move freely in open spaces with a working distance of 160 feet to 200 feet. 2、EXPANDABLE WIRELESS MONITORING SYSTEM: Unlimited number of belt pouches can be added for stage monitoring assignments, with superior earbuds delivering pristine sound and enhanced performance. 3、WIDE SCENES: Wireless earphone monitor system is perfect for a variety of wireless stage return events, guitar monitors, performances, studio recordings, exhibitions, presentations, instruction and more. Can be mounted on a standard rack unit. 4、40 CHANNELS: The wireless earphone monitor system has 40 channels, the widest tuning range, ultra linear RF transmission, and a stronger signal than any other ear monitoring system. 20Hz‑25KHz wide frequency response, 107 dB dynamic range. 5、UHF BAND: 550‑580Mhz wireless in the ear monitoring system create your or team monitoring system. Uncompressed wireless signal transmission with low noise and latency. Provides fluent frequency response for any headphones. 6、EASY SETUP, METAL MATERIAL: The wireless earbud monitor system is easy to set up with uninterrupted frequencies to optimize the sound performance of this monitoring system. Made of tough metal material for durability. Item Type: Wireless Earphone Monitor System Material: Metal Frequency Stability: ± 0.005% Frequency Range: UHF 520-580MHz Frequency Interval: 32 Mhz Preset Channels: Two Way 40 Channels Were Set up 4 Groups Operation Mode: Manual Adjustment Maximum Deviation: ±48khz Frequency Response: 50hz~15khz Earth 3db Transmitter Output Power: 100mw (50q) Harmonic Radiation: <4nw Headphone Output: Diameter 6.35mm Stereo Socket Beltpack Battery: AA Batteries x 4 (Not Included) 1 x Host 1 x Antenna 1 x Power Adapter 2 x Waist Pack 2 x Connection Cable 2 x Earphone 8 x Earplugs 2 x Clip 1 x Instruction Manual