Features: <br> <br>Configuration of large data display screen, data display clear and accurate, easy to observe. <br>Support year, month, day, hour, minute and week display, 12/24 system conversion and Celsius, Fahrenheit temperature display switching. <br>It has a wide range of temperature measurement, indoor humidity measurement function and simple use method. <br>Configuration 1 minute alarm, 5 minutes sleepiness function, you can set your own alarm clock. <br>With vehicle power supply backlight function, low power consumption, energy saving and environmental protection. <br>Supports the highest and lowest temperature and humidity alarm settings, can display the moon, with weather forecast function. <br>It can monitor the battery voltage in real time and display the current voltage digitally. <br>The state pattern of the voltage indicates that when the voltage is too high or too low, there will be an alarm sound. <br> <br>Specification: <br>Condition: <br>Material: ABS <br>Temperature Range: <br>Outdoor: -50℃ To 70 ℃ (-58℉ To 158℉) <br>Indoor: -10℃ To 60℃ (14℉ To 140℉) <br>Application: Universal 12-24V <br>Battery: 1 x 2032 Button Battery (Battery Not Included) <br> <br>Package List: <br>1 x Instruction Manual <br>1 x Car Clock (Battery Not Included) <br>1 x Bracket <br>1 x Cigarette Charger <br> <br>Instructions: <br>1. Press the ''MOTE'' button in the normal time to switch between the following functions: general time - alarm status - date status - lowest temperature humidity - highest temperature humidity - indoor and outdoor temperature/humidity. <br>2. Press the ''RECELVE'' button in the normal time to view the highest and lowest temperature humidity settings. <br>3. Press the ''SET'' key to switch between Celsius and Fahrenheit in normal time. <br>Time setting: <br>1. Press and hold the ''SET'' button for 2 seconds in the normal time state to enter the time setting state. <br>2. Press the ''RECELVE'' button to switch the 12/24 hour display. <br>3. Press the ''SET'' button for a minute to flash, press the ''RECELVE'' button to increase the minute, long press to speed up the adjustment. <br>4. Press the ''SET'' button to flash the hour, press the ''RECELVE'' button to increase the hour, long press to speed up the adjustment. <br>5, press the "SET" button to return <br>General time status alarm settings: <br>1. Press the ''MODE'' button in the normal time state to enter the alarm state. <br>2. Press the ''SET'' button for 2 seconds to enter the alarm setting state, and the alarm will flash. <br>3. Press the ''RECELVE'' button to display the alarm, turn on the overall harmonic, turn on the alarm and the whole point, turn off the alarm and the whole point. <br>4. Press the ''SET'' button, the minute flashes, press the ''RECELVE'' button to increase the minute value, long press this button to speed up the adjustment. <br>5. Press the ''SET'' button, the hour flashes, press the ''RECELVE'' button to increase the hour value, long press this button to speed up the adjustment. <br>6. Press the ''SET'' button to confirm the alarm setting and retur<br>1、Configuration of large data display screen, data display clear and accurate, easy to observe <br>2、Support year, month, day, hour, minute and week display, 12/24 system conversion and Celsius, Fahrenheit temperature display switching <br>3、It has a wide range of temperature measurement, indoor humidity measurement function and simple use method <br>4、Configuration 1 minute alarm, 5 minutes sleepiness function, you can set your own alarm clock <br>5、With vehicle power supply backlight function, low power consumption, energy saving and environmental protection Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.