2wires apartment intercom system video door phone, video door enry for apartment building.
it can support 32 apartments, non-polarity, easy connection, simple installation.

2wires apartment intercom system video door phone, video door enry for apartment building.

it can support 32 apartments, non-polarity, easy connection, simple installation.

direct call button outdoor station, it is extendable, 2 wires connection,