This temperature controller has PID self-identification function, digital display, 0-400 measuring range. It is used for temperature-controlled systems to control temperature. Features: With PID self-identification function. With clear screen display for better readability. Wide temperature measuring range 0-400. It adopts industrial instrument special chip, stable performance. Can be used for vegetable greenhouse, domestic water tanks, aquarium, aquaculture and other temperature-controlled systems to control temperature. Specifications: Type: 220V CK long, 100-240V CK long, 100-240V DK short (optional) Material: ABS Color: Black Input Signal: K-type Thermocouple Temperature Range: 0-400 Master Output: relay contact output (relay) Alarm Function: No Package Weight: 220V CK long: 226g / 7.97ounces 100-240V CK long: 160g / 5.64ounces 100-240V DK short: 138g / 4.87ounces Package Size: 220V CK long: 107 * 48 * 48mm / 4.21 * 1.89 * 1.89in 100-240V CK long: 107 * 48 * 48mm / 4.21 * 1.89 * 1.89in 100-240V DK short: 86 * 48 * 48mm / 3.39 * 1.89 * 1.89in Packing List: 1 * Temperature Controller 1 * Fixed Bracket