Temperature Controller TD4-SNR + Solid State Relay SSR-40DA, Dual Display For Fahrenheit(F) And Celsius? Accuracy: 0.2% Width switch power: 90-260V AC/DC Dimension: DIN: 1/16 (48WX48HX80Lmm) Display: Dual display for Fahrenheit(F) and Celsius(C) Range: -1999 to 9999 (depends on the input signal)