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 ...View More
Messages of visitorLeave a message
No public comments yet
Wall Mounted Metro Highway Train Station Help Point Intercom for Public Transportation