(1). (N + 2) vertical wiring, (ie two core "public line", plus a core household "address line").
(2) three-wire extension into the family, music, ring tones and unique power-off waiting function, long life.
(3). "Common" and the extension into the family line short circuit, have lights instructions, while a host short-circuit protection.
(4) The host has 1 2V reverse polarity protection circuit power lines, power lines reversed, it will not damage the host.
(5). Motherboard built unlocking conversion circuit, the power to support two different power lock or unlock electric lock.
(6) motherboard features a high-voltage, high-power spark unlock circuits, and electronically controlled lock function enables unlock more reliable protection.
(7) should be the customer needs, additional ID / IC card access lock or unlock function wireless remote control.