Connect way
Two-way connection, door to door
Output sensitivity
<60mV ( frequency 1000 Hz )
Frequency response
±3dB ( 300Hz-3400Hz )
intercom working current
<100mA
Effective talkback distance
3 kilometers
Ring sound level
>70dB ( AT 0.5m )
Door phone type
audio door phone
Battery type
4 cells of R6P SIZE AA1.5V