DURABLE TO DURABLE: Rugged all-metal construction for four-channel UHF wireless microphone receiver and high-sensitivity unidirectional handheld microphone for heavy use. The high-quality dynamic cartridge is designed to limit feedback and interference, sound smoothly and transmit it with ease. Provides clear, powerful, best true sound EXCEEDING EXPECTATIONS OF WIRELESS PERFORMANCE: The 4-channel wireless microphone set features a fixed frequency design of , providing superior signal stability and eliminating unwanted distortion. receivers feature an LCD display showing frequency numbers and individual volume controls for precise vocal balance. Long-range reliable performance up to 260 feet in wide open space line of sight Versatile: Automatically pair with the transmitter for easy plug-and-play setup. A separate bodypack transmitter is available for a more flexible wireless microphone system. Perfect for all outdoor events such as parties, weddings, presentations, conferences, small shows, karaoke Rugged Construction, Multi-Channel Multi-Group Function: Rugged metal construction for wireless receivers and cordless microphones. Cardioid dynamic cartridges are designed for the best true sound with clarity and robustness. Multi-channel function allows users to select a different frequency when the preset frequency fails Dynamic range: Dynamic mic core Frequency response 40HZ ~ 15KHZ Pointing: Unidirectional Sensitivity: -543dB Impedance: 600ohm+ 30 % Colour:black+gray Material:abs+metal Size:40 x 40 x 8cm Package Contents: 1 x Transmitter 4 x Microphone 4 x anti-skid ring 4 x windproof cotton 1 x 3.5 adapter 1 x usb data cable 1 x Battery Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.