Temperature Controller TD4-SNR And Solid State Relay SSR-25DA, Powered By 90-265V AC/DC, Comsumption: 5VA. DIN 1/16 (PID control) Display: Dual display for Fahrenheit(F) and Celsius(C) Range: -1999 to 9999 (depends on the input signal) Main output: SSR, open circuit: 4V, Closed Circuit: 24V 40mA DC Auto-tuning / Manual PID control ( can choose normal alarm output by software) Alarm Output: RELAY: capacity 250V/3A AC, 30V/3A DC