... in S-MDC-0210, S-MDC-0211, S-MDC-0212, S-MDC-0213, S-MDC-0400, S-MDC-0401) Wireless gap window/door sensor (Using in S-MDC-0210, S ... -MDC-0211, S-MDC-0212, S-MDC-0213, S-MDC-0400, S-MDC-0401)1) It is ... the wireless alarm host and magnetic iron fixed box. Once the battery is put in, it will work. When it probes that ...