4 Channel UHF 4 Handheld Wireless Microphone System. BRAND NEW — NEVER USED. Very high quality Professional UHF microphone system. GTD Audio U-504 is a high quality professional and reliable 4 channel UHF wireless handheld microphone systems. It uses the most advanced technology called SMT (Surface Mounted Technology) and is made of the highest quality surface mounted components to ensure its quality and reliability. Its ideal for professional performance, in church or home karaoke use. 4 Channel Receiver with Handheld Microphones. Individual volume controls on each Channel. One 1/4 Mixed and four XRL Individual outputs. Carrier Frequency: UHF 530580 MHz. Frequency Stability: ±0.002%. Audio Output Impedance: 600 Ohm. S/N ratio: >105dB (1khz-A). Battery Life: 9 Hours (AA batteries). 1pc 4 channel UHF receiver. 1pc 1/4 Audio cable. The item “GTD Audio 4 Channel UHF Handheld Wireless Microphone System Mic (Brand New) 504H” is in sale since Tuesday, January 10, 2017. This item is in the category “Musical Instruments & Gear\Pro Audio Equipment\Microphones & Wireless Systems”. The seller is “microphone-usa” and is located in Catonsville, Maryland. This item can be shipped to United States, Japan, Canada, United Kingdom, Australia.