Features: two-way communication with the function; 
 Open the electronic lock remote control; 
 One-way control function; 
 Call functions with the insiders; 
 Automatic infrared fill light function. 
 Product operation: 
 First, the four terminal functions: 1, video; 2, ground; 3, call / call; 4, the input voltage 
 Second, the operational guidelines 
 1, visitors click the call button doorbell, indoor issued twice, "Ding dong, ding-dong" ringing tone, also shows visitors the image. If the master to receive the indoor intercom button click, you can talk with visitors, press unlock button to open the electric lock, inviting guests to enter; such as unintentional reception, do not add ignored, can not come to visit the indoor movement, 30 seconds Indoor images automatically shut down the system into stand by state. 
 2, the owner speaking with visitors after 60 seconds, the indoor pictures automatically shut down the system into stand by state. 
 3, by monitoring key click, the indoor unit can take the initiative to monitor the situation in the door, then click the monitor button to hang up the image. 
 4, adjust the volume knob, you can change the call volume; adjust the contrast, brightness knob, to change the image effect. 
 5, according to the Open button to open the electric lock. 
 6, in the next two indoor unit when the indoor unit according to one of the call button, another local issue, "Ding dong, ding-dong" ringing, two indoor unit does not open the video, click on another indoor unit intercom button, you can two-way call, the call to achieve real. 
 Third, the power: 
 1, DC-DC converter input voltage 220V ± 10% 
 2, the indoor extension for a voltage 12DV 
 3, power consumption: Standby: 0.5W, work ≤ 14W 
 Fourth, the work environment: 
 1, 50 degrees -20 degrees ------+ 
 2, humidity ≤ 90% 
 V. Notes 
 Do not place metal objects into the machine, not the water within the liquid streaming into the body, do not fall looking glass.