... ,by key,work attendance function 3: handfree,night vision 7" Color Video Door Phone unlock by ID card,by password,by ... ,good design,CMOS or CCD sensor.6 LED lights,nightvision.**handfree indoor monitor,7 inch TFT,clear image.**intercommunication,monitoring the ... monitors.(different choice)**four wires,DIY installation**Including in one kit:One indoor monitor, one outdoor camera, power adapter, user ...