Introducing to the market the Brand New Delta Electronics EC2 ECHO BOARD!! From the same designer and makers of the widely acclaimed Delta M2 microphones is the newest, most innovative Echo Board ever brought to market! No echo board is as simple to install with only 4 wires for connection into ANY RADIO!!! Unmatched Echo sound giving you that BIG BOOMING THEATER ECHO SOUND!! Its Micro Size at only 2 inches x 2 inches is so small it can easily be put into ANY RADIO!! Simply wire up 4 WIRES to your mobile or base radio and experience ECHO that will make you sound like you were transmitting from the Grand OLE Oprey!!! Wire to RED, BLACK, Audio IN and Audio OUT and your all done!! With the included dual knob mounted on your radio you can shut off and control the echo. On the board is a red LED that will light when power is given confirming you've installed it all correct! FEATURES: * Dual Controls Of Timing & Repeat * Easy To Install In Almost Any Radio * Simple Install Instructions Included - Connects Directly To 12 VDC, Ground, Audio In and Audio Out * Adjustable From A Simple Big Room Base Radio Sound To FAST Repetitive Repeats! * Mounting Holes on board. * Small 2" x 2" Size Won't Clutter Radio and easy to stash inside radio chassis! * Standard Components For EZ Repair - Not SMT * Clear Voice Technology Sound. * No Complicated Assembly or Adjustments Needed