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!
Check this out!
ETS SMI-9 8 Zone Audio Surveillance Kit W/ 8 SM1 Microphones and SMI8 Interface
The ETS SMI-9 is an 8 zone audio surveillance kit designed to connect to audio recorders, CCTV monitors (with built in speakers), video recorders, DVRs, remote monitoring equipment, etc.