The internal control resolution now is 0.01C degree. The control feedback starts from every 0.01C change. An integrated SSR output with 5A rate power driving ability. An auxiliary output: timer on/off, and/or high temperature protection Model Number: ZL-7817A Max Measuring Temperature: 100Celsius - 119Celsius Theory: PID digital temperature controller Display Type: Digital Usage: Industrial Power Type: Charger Style: Standing Station Display Size: 1.9 Inches & Under Control Resolution: 0.01C Sensor: NTC, R25Celsius = 10K, B25/50Celsius = 3470K Setting range: -40.0 - 130.0Celsius Power supply: 100 - 240Vac, 50/60Hz Output R1: 5A, 250Vac (rated current) Output R2: 7A, 250Vac (resistive) Protection level: IP65 (Front side only) colour:Gray-black Material:PC+ABS size:78 x 34.5 x 71mm Package Contents: 2 x Temperature Controller