Check the listing for details. 4 Channel UHF Pro Audio Wireless Microphone System 4 Handheld Metal Dynamic Mic. Color: Gold, Condition: New. Listed at 149.99 USD. eBay Pro Wireless Microphone System, 4-Channel UHF Wireless Mic, Fixed Frequency Metal Cordless Mic with 4 Handheld Dynamic Microphones, 260ft Range, Microphone for Party/Wedding/Speech/Church/Stage/Karaoke/DJFeaturesProfessional 4 channel UHF wireless handheld microphone system, stylish and compact design. 600-865MHz frequency range, high sensitivity, super clear sound, great anti-interference capability. Effective working range up to 260FT(80 meters)in open-area. Standard XLR balanced and 1/4" mixed output interface. Independent volume adjusting knobs for 4 channels, with AF/RF indicator light. One mic run on 2 * AA batteries(not included), and the receiver powered by power adapter. Comes with a 1/4" audio cable. Perfect for stages, ballrooms Karaoke, families party, meeting, as well as for giving a speech, presentation, public address. Specification: Power: 75 dB. Frequency range: 50 Hz ~ 16 KHz. Squelch control mode: multi-squelch circuit. Maximum output level: + 10dBV Sensitivity adjustment range: 12-32 dBμV. Power supply: external DC supply, 0.8 A, 12 ~ 15 V DC. Usage distance: Open environment: 50-80m Complex environment: 30-40m Frequency range: 621.5 ~ 643.7 MHz. Receiver: Oscillation mode: quartz crystal oscillation Maximum frequency shift: 50KHz Signal to noise ratio: >103dB Distortion: