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Connection Device for Option Input
Input method: No-voltage contact
Open-circuit voltage between terminals: DC 7 V or less
Detection definite time: 0.1 seconds or more
Short-circuit between terminals: 5 mA or less
Resistance value: make: 500 Ω or less, break: 15 KΩ or more
Model Composition : VL-SV71
Indoor Station VL-M71
Outdoor Station VL-V522L
feel luxury in my budget
guaranteed satisfaction products
excellent
good products
there are 2 wire video connection, products picture quality, ringer and other functionality is wonder ful, wdr also ok, but video i think so not 100% 30fps