Digital audio door phone

WL-03NLA main functions:(1)One door station can support four hundred indoor phones at most.(2)Network application optional. (3)When in network system,the door station can have a dual communication with the management unit.(4)Remote unlocking.(5) With card reader function,you can unlock the door by card.(6)There are two kinds of indoor phones(WL-02NLFC,WL-02NLFD) available which can be connected to the door station(WL-03NLA).
Technical parameter:
Door station : WL-03NLA 
a)    Working voltage: DC12V±10%
b)   Static current:≤75 mA
c) Working current: ≤250mA
d) Environment temperature:-25 to +70 degrees
e)    Humidity: 45% to 95%
d)  Dimension: 348x130x52 mm

Indoor phone: WL-02NLFC
a)    Working voltage: DC 12V±10%
b)   Static current: 0
c)   Working current: ≤20mA
d)  Dimension:201x80x67 mm

Indoor phone: WL-02NLFD
a)    Working voltage: DC 12V±10%
b)   Static current: 0
c)   Working current: ≤20mA
d)  Dimension: 201x80x67 mm

Model No:

(WL-03NL1(A