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Vhf wireless microphone system 200ft wireless range rider rx-68a very high frequency (vhf) wireless cordless portable handheld transmitter microphone system with receiver for public address system, studio, karaoke, radio, live-performances, conference halls, musical shows, opera, public speeches , meetings, class room teachings, demonstrations, while move Introducing an affordable high performance vhf wireless microphone system. It consists of one wireless microphone and a highly sensitive vhf receiver. This ensures effective long distance coverage of approx 200 feet, under ideal working conditions. This professional series wireless microphone system used an efficient American, low consumption discharging technique with a super sensitive vhf high band frequency receiver and controlled with 15-ppm crystal, a put on and off to hit noise and digital control circuit resist reverberation circuit and changed output controlled slowly balanced output and mix output. Transmitter has an on on/off switch and a led for on indication. 1/4" (6.3mm) phone jack for audio output on the rear panel of the receiver. P-38 mono male to p-38 mono male cable 1 x microphone, 1 x receiver, 1 x English user manual, 1 x power adapter, 1 x connect cable, 1 x 9 volt battery Main features: high precision quartz crystal to lock the frequency. High sensitivity and high s/n ratio, high fidelity without noise. Superior selectivity, multi-channel can use at the same time, do not interfere with each other. Suitable for studio / karaoke / radio / etc. Ideal environment for using distance is up to 60 meters, complex environment and practical distance is 40 - 50 meters. System parameters: - carrier frequency range: 220 - 270mhz - frequency response range: 60hz - 16khz - harmonic interference: more than 80db - radio frequency stability: plus or minus 0.005 percent - s/n ratio: more than 85db - output intensity: 0 - 400mv - harmonic distortion: less than 0.5 percent - microphone is powered by 1 x 006f 9v battery ( included ) - receiver dimension: 148mm x 100mm x 30mm