"4 digit Dual display temperature controller -(TC: J, K, T, R, S/ RTD: PT100) sensor input -ON-OFF/Auto-tune PID control -Dual set point-5A Relay/ 12V SSR control output -Auxiliary 5A Relay output -72 mm x 72 mm size -Heat-Cool PID and Dwell timer functions -Panel mount -90 to 270V AC/DC supply voltage"