audio door phone kits features:
1.Wall mounted, easy installation.
2.Speak to the person at your door, everywhere in and around your house with clear and lifelike sound.
3.You dont have to walk to the door anymore; open the door remotely (with optional electric door opener).
3.Always feel safe, you know who is at the door before you open it.
4.Available to expand with 2 more outdoor unit,connecting each other by two non-polarity wires.
5.Power is offered by the indoor and outdoor unit separately ,battery is also OK when power cuts
Application of audio door phone kits:
It is widely used in office,apartment/nursing home intercom for talk back needs.
