Sony 1 trailer 2 one with two campus radio wireless microphone microphone diameter 200M

Package: receiving host, two handheld microphone, audio line, 9V battery two. Frequency range / Carrie Frequency Range: VHF200-290MHz frequency stability / Frequency Steadying: ± 0.05% of kinetic energy range / Mobile State Range:> 90dB Modulation / Modulation Mode: FM frequency response / Frequency Response: 40Hz-KHz SNR / S / N Ratio: 90dB≥ THD: <0.5% (1KHz) Frequency Interference ratio / F / N Ratio:> 80dB image frequency interference ratio / P / N Ratio:> 80dB Audio Output / Audio Output: Detached: 0 ~ ± 300mV Hybrid 0 ~ ± 200mV range Diameter / Service Areas: ≥150 meters (open land) Temperature Range Temperature Range: -30 ℃ ~ 50 ℃ http://ruikangdq.taobao.com