... 6 indicator lights 3.Semiconductor sensor Super Semiconductor 6 LED Lights CO transmitter Featuresu Wall mounting, real time ... -CO-L100CO indicator with 6 LED indicator lightsF2000TSM-CO-L100CCO detector with 6 LED indicator lights,RS485 communication interfaceF2000TSM ... lights, One relay outputF2000TSM-CO-L101CCO controller with 6 LED indicator lights, One relay output. RS485 communication interface ...