Industrial Covert Unlimited is in its 20th year of operation. CU1.COM has been up since mid 1999. Great security & CCTV products and people who answer the phone!
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ETS STWI5-W4 Audio Kit W/ STW1-W4 Wall Mount Microphone/Speaker, STWI-1 DVR Interface Box
The ETS STWI5-W4 is a single zone 2 way audio surveillance system. This audio kit is made for use with DVRs, IP cameras, and remote monitoring equipment. It includes a surface mount 4" microphone / speaker for residential applications.