*Two wire connection, easy to instal *High - quality circuit to promise sharp clear voice.
*Effective intercom distance 200m(2*1.0m)*plastic outdoor unit is treated as anti-oxidation and wear resisting, very durable*interphone support AC altermating current, without battery. *interphone dimensions.
*weight :1kg/set use introduction one push the call button, the other can talk at the same time.
Installation and requirements of wire :intercom :2 core wire.
Application :suitable for upstairs to downstairs, inside door to outside door, building and office to office, stores and supermarkets with two-way and intercom voice communication systems.