Transportation Help Point Intercom For Hard Of Hearing People
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Technical Parameters Voltage DC5V/1A Standby working current ≤300MA Frequency Response 250~3000 Hz Ringing level ≥85dB(A) Anti-corrosion grade WF2 Ambient temperature -20~+60℃ Air pressure 80~110KPa Relative humidity ≤95% Lead hole 1-Ø10 Installation ......
Shenzhen Yuantong Modern Technology Co., Ltd.
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