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| Name︰ | wireless video door phone |
| Model No.︰ | ERF-20MBT |
| Brand Name︰ | wellsun |
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Dimensions:140×100×40mm
Specification
Power source AC110/220V, 50/60Hz
CLaunching characteristics
Intercom launching power: ≦ 20mW
Receiving frequency: 47.0-47.5MHz
receiving sensitivity: S/N=29dB﹤10uV
Interfere : ≧50dB
Working channel: 1-20CH(reset)
Unlock signal launching power: ≦100mW
Work channel: 1-4CH
Operating temperature Unlock voltage: +12V
Unlock time 0.1-0.5 seconds (can be reset)
Max. Unlock current: 3A
Mini illumination: 0.1 LUX
Talking time: 10-180 seconds (can be reset)
Working temperature: -10—+55℃
Contrast humidity：10%~90%
Atmosphere pressure：86~106Pa
Surrounding noise：≧60dB（A） |
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