ITEM NAME:DC 4-28V Precision Dual Digital Display Thermometer NTC Waterproof Metal Probe Instructions for use: [1] DC power supply: This product requires access 4-28V DC power supply, the red line for positive power supply, the black wire to the negative power. The greatest feature of this product: its own reverse anti-burning circuit, avoiding the user process due to improper operation problems. Friendly reminder: must not be connected with AC 220V Oh! [2] Display Description: When the temperature sensor is removed when the digital display "- - -", the temperature is below -20 ℃ or above 100 ℃, digital also shows "- - -." [3] Acquisition normal temperature range: -20 ℃ to 100 ℃, resolution 0.1 ℃, accuracy of 1 ℃. Product Usage: (1) Measuring the temperature inside and outside the car (2) Measuring the temperature inside and outside the air-.The greatest feature of this product: its own reverse anti-burning circuit, avoiding the user process due to improper operation problems. Friendly reminder: must not be connected with AC 220V Oh! Due to the difference between different monitors, the picture may not reflect the actual color of the item.
