Features: The upper number displays actual temperature, and the lower displays setting temperature. When the actual temperature is higher than the setting temperature, the temperature controller brackovers, and conversely, it disconnects. Please strictly according to connection and the positive and negative pole on user manual! Description: Style: Standing Station : Temperature Controller Display Type: Digital Usage: Industrial Specifications: Number: W2809 Max Measuring Temperature: 100°C - 119°C Temperature measurement range: -50°C - 110°C Resolution: 0.1(-9.9-99.9); 1(other temperature range) Measurement accuracy: ±0.1°C Control accuracy: 0.1°C Return difference accuracy: 0.1°C Refresh rate: 0.5S Temperature protection: 0-110°C Input voltage: DC12V Measuring inputs: NTC(10K0.5%)Waterproof type sensor Output: 1 way 20A relay Environmental requirements: -10-60°C , humidity 20% -85% Hole size: 46x26.5mm consumption: Static current: less than equal 35MA,attract current: less than equal 65MA supply: 12V 200MA Material:plastic colour:As Shown Package Contents: 1 x Temperature Controller Only the above package content, other products are not included. Note: Light and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.