... peephole can capture image in low-illumination environment4. Indoor monitor can automatically capture, store and view photo with ... One peephole support up to 4 indoor monitors simultaneously and vice versa.8. The system is with Monitor, Unlock, Talk function9. ... meters (ideal conditions) - Onboard Buttons/Indicators - Unlock Door, View Monitor. Talk Button, MIC, LED Indicator, Mini USB Input, Speaker, ...