PREMIUM WIRELESS PERFORMANCE: 4 channel UHF wireless microphone system with selectable frequency. Channel 1: 538.3 - 550Mhz (40 channels). Channel 2: 554.8 - 566.5MHz. Channel 3: 571.3 - 583MHz. Channel 4: 587.8 - 599.5MHz. Employs PLL frequency synthesized technology to provide hassle-free sound transmission, minimum dropouts, and maximum feedback rejection. Smooth and quick IR synchronization. Long range operation of 290ft – 328ft line of sight | STURDY BUILD, MULTICHANNEL MULTISET FEATURE: Sturdy metal build for wireless receiver and quality build for bodypack transmitters. Beige flesh toned color of the wireless headsets and lavalier mics enable great invisibility and professionalism during performance. The mic cartridge is engineered for clear robust optimal true sound. Multichannel feature with 4x40 channels, enables users to select different frequencies when preset frequency fails, thus ensuring reliable performance | AUTO SCAN FEATURE AND ANTI-INTERFERENCE FEATURE: UHF sound system equips with auto scan function, which enables system to search for the least interference channel to pair up with transmitters. It also has one 1/4’’ mixed output and 4 XLR separate outputs. 4 antennas design increases anti-interference ability and decreases interference between each channel. Ideal for church, wedding, karaoke, DJ, stage shows, public speaking, etc | BOX CONTENTS: 1 four-channel wireless metal receiver for long range operation, 4 UHF bodypacks, 4 beige wireless headset mics, 4 beige lapel mics, 1/4’’ audio cable, power adapter, 4 antennas, 8 AA batteries for 16hrs long-hour use, 1 user manual | DEVOTED SERVICE: Genuine Phenyx Pro audio products come with 1-year Warranty & Supportive Customer Service. Welcome to come to us for discontinuous/defective parts or troubleshooting, service @ phenyxusa.com or support @ phenyxpro.com