Features: Working voltage：DC4-28V. Temperature range：-50 ° C ~ 120 ° C. The display and control temperature can be set to 0.1 ° C. Easy installation: Red wire for positive, black wire for negative. Widely used in the hatching area, equipment for case, air-conditioning-system, temperature control for protection, etc. Specifications: Material: ABS Type: annular sensor/rod sensor Operating voltage: 4-30V Voltage measurement: 4-30V Error: ±1.0V (not adjustable) Temperature measurement range: -50℃-120℃ Error: ±1.7℃ (not adjustable) Working current: equal or less than 20mA Temperature sensor: ring-shaped or rod-shaped NTC 3950 10K 1% sensor, length 100cm Standard wire: XH-2.54-2P red and black wire (thin wire, total length 155mm) Red line is connected to the positive pole of the power supply, and the black line is connected to the negative pole of the power supply Package Includes: 1X Digital Thermometer note: Please allow 1-3cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item.