... S-MDC-0400, S-MDC-0401) Wireless gap window/door sensor (Using in S-MDC-0210, S-MDC-0211, S- ... . 2) It consists of the wireless alarm host and magnetic iron fixed box. Once the battery is put in, ... moving distance (opening door) is more than 30mm, the indicator light (red) will turn on, and the signal will ... s artwork and logo MDC-0301 Wireless gap window/door sensor (Using in S-MDC-0210, S-MDC-0211, S ...