Features: 1. and . 2. This product has PID self-identification function 3. With clear screen display for better readability. 4. Wide temperature measuring range 0-400 5. Can be used for vegetable greenhouse, domestic water tanks, aquarium, aquaculture and other temperature-controlled systems to control temperature. Specification: Condition: Model: REX-C100FK02-M x AN With PID self-identification function Input Signal: K-type Thermocouple Temperature range: 0-400 With PID self-identification function Master output: relay contact output (relay) Alarm function: No Weight: Approx. 146g / 5.1oz Mounting Hole Size: 45 x 45mm/1.77 x 1.77in Product Size: Approx. 85 x 48mm / 3.35 x 1.89in Package List: 1 x Temperature Controller Note: Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.