Check the listing for details. Upgraded Temperature Thermometer Tester Control with Metal Probe ABS. Condition: New, Made in China. Listed at 3.21 USD. Features: Working DC4-30V Temperature 50 ° C ~ 120 ° C. 2 types for your option: annular rod Easy installation: Red wire for positive, black wire for negative. Widely used in the fish for refrigerator, water, temperature control for Specifications: ABS Type: annular rod optional Operating DC4-30V Temperature measurement: -50℃~120℃ error ±1.7° (not adjustable) Working current: equal or less than 20mA Temperature ring-shaped or rod-shaped 3950 10k1% length 100cm 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.