1:switch on manifestation in single line temperature inside the automobile. 2: Memory the tallest and lowest room.Inside the outside temperature value, can clearance the tallest and lowest room.Inside outside temperature value. Celsius and the Fahrenheit degree conversion(press to make ON/OFF, MAX/MIN and C/Fs) 3: Measure scope:-40 ℃s~50 ℃s.(-40 ℉s~122 ℉s) 4: Measure a resolution: 0.1 ℃s/0.1s ℉ss. 5:measure accuracy: +/-One ℃ (0 ℃s~50 ℃s), other+/-2 ℃s 6: The 1 m outdoors temperature responds line, the watertightness detects a head. 7:shape size: 60.3(long) xes 20.6(breadth) xes 26.5(thick) mms 8: The Windows size:46.5 xes 16 mms 9: The 1.5 V AA(5#) battery