ETS SMI-4 4 Channel Microphone Interface Box

4 Channel microphone Interface Box. The SMI4 is an ETS 4 box which able to connect CCTV monitors with speakers, audio recorders, remote monitoring equipment and video recorders together. features easy cables run termination, RCA standard jacks for connection devices, reverse polarity protected fused, as well showing LED power indicator. includes x pre-amplified SM1 microphones, a adaptor, consists supply 12VDC @ 40mA. compact size use install, plus it also comes affordable most applications can save on time money user.

• Easy terminations
• Includes tape etc
• Offers indicator
• Reverse fused