... camera 3: Handfset indoor monitor 4: lowest price Hot B/W video door phone :Model:SMTV1B-S Model:SMTV1B-SFunction ... .6 LED lights,nightvision.**handset indoor monitor, 4 inch CRT,clear image.**intercommunication,monitoring the outdoor,unlock..**Intercommunication ... rings for option.**two cameras can connected with four monitors.(different choice)**four wires,DIY installation**Including in one kit:One ...