Basic function:
1.the outdoor unit can connect several color/ B&W indoor units 2.You can call the indoor unit to make video communication and unlocking from the outdoor unit 4.The outdoor unit has IR LEDs , BLC available , with night vision 5.one outdoor unit can connected several indoor units
Optional-function:a switch can be connected to the outdoor unit to control locking and unlocking, can be connected to management center,with security feature and IC card door unlocking
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