... 4,door safety viewer Big LCD display camera peephole viewer PS601ASpecification 1. The operation is simple and safe: ... 7. Low power remind function: When the power is not enough, the indicator at the right bottom ... role in home anti-theft door monitor and it is composed of digital camera, mainframe, display screen. ... s need , take photos . In fact, it is a digital camera. It solves the problem of the old ...