2-Wire Connection intercom Audio Door Bell Phone for Door access control system

2-Wire Connection intercom Audio Door Bell Phone for Door access control system   PY-DP3207   2-wire connection  With unlocking function.
Anti-oxidation, wearable aluminum outdoor unit.  
The name or room No. of the user can be displayed on the outdoor unit , along with LED indication.  
High-quality circuit to promise sharp clear voice.  
Talking distance is above 100m (2X0.75mm2).  
Easy DIY installation   Audio Door Phone PY-DP3207 detail pictures:   Our Services     Advantage:                                                                                                                         1.Good quality with competitive price   2.Professional technique supports and great services   3.Fast delivery and safe shipping way   Payment terms:                                                                                                                 T/T,Western Union, Paypal   Shipping way                                                                                                                      Fast way: by Express courier, such as DHL,FedEx,UPS,TNT,EMS etc.,   Feedback quickly:                                                                                                              Any inquires will be replied within 24 hours;   We can provide online supports for you when need helps on testing.   Warranty:                                                                                                                            1-2 years warranty from the date of delivery.A lifetime technical support.   We warmly welcome you will join us,make Win-Win cooperation.