Profile: Conex Electro-Systems, Inc. is a manufacturer of digital barometers and thermometers and other weather instruments. Our product line includes DTMF remote control, cell phone interfaces and cell phone accessories. Our DT-55 Telephone Remote Control is equipped with miniature screw-clamp terminal strips for easy connection to your external circuits, easily distinguishable tones indicate the high-low or open-closed status of the ten external inputs and status lights indicate the ringing signal, power, DTMF tone detection, line connection & access. Our DT-90-telephone is controlled by audio switcher status lights indicate the ringing signal, power, DTMF tone detection, line connection and access. It is featured with four mono channel inputs and one mono channel output.