The Autonics PRFWT18-5DO-IV is a digital output temperature controller. It features an input for K-type thermocouple, RTD or DC4-20mA input, a programmable scale range of -50-1000°C, and an output for 5A relay type with self-tuning PID control. It also has a SSR (Solid State Relay) control output, a digital setting with 4 buttons, and a bright 4-digit LCD display. It also has various functions such as automatic tuning, single-setpoint control, day/night control, alarms, and auto-manual control. It is an easy to use, reliable and cost-effective solution for temperature control applications.