Divinext VHF Wireless Microphone System 200ft Wireless Range Rider Rx-68 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 Indoor, Outdoor PA System  (1 W)

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: 210 - 280MHz - Frequency response range: 60Hz - 16KHz - Harmonic interference: more than 90dB - Radio frequency stability: plus or minus 0.005 percent - S/N ratio: more than 90dB - Output intensity: 0 - 400mv - Harmonic distortion: less than 0.5 percent - Microphone is powered by 1 x 006F 9V battery ( included ) - Microphone dimension: 235mm x 32mm x 32mm - Receiver dimension: 148mm x 100mm x 30mm