1, Indoor Unit: 7” LCD colorful screen, with 25 chord ringtones, one key unlock function, with mute mode. 2, Night Vision: IR night vision, providing clear vision of visitors even in the darkness of night. 3, Function: Support two-way audio and ringback function; Support hands-free intercom and monitoring; Support to adjust the volume of the ring. 4, Waterproof and dustproof: The outdoor camera equipped with a waterproof cover, can be used even in very bad weather. 5, Applications: Wired connection stability clear vision for home security, Can be used in apartments, villas, hotels, offices, public buildings, etc.