brand new and high quality Features: Multi-functional ultra-thin electronic clock module with a thickness of only 10mm, integrating for time, temperature and voltage. An item can be displayed separately, or each item can be displayed alternately in a loop, and the item to be displayed can be customized. The for time chip uses for Epson's RX8025T chip, which is a clock chip with temperature compensation and accurate for time. Temperature display range -35~120 degrees. With brightness adjustment function, 5 levels of brightness can be adjusted. With automatic brightness function, it can be darkened at night and brightened during the day. Specification: Working voltage: for DC 4.0~25V Voltage display range: 4.0 ~ 25V Temperature display range: -35 ~ 120 C for Shell material: Plastic Dimensions: 93x36mm/3.66x1.42inch Cable length: 1m Color: Black Quantity: 1 Pc Note: 1.Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Package includes: 1 x Car LED Dot for Matrix Clock ---------------------- User Guide: Short press: In the normal display state, short press the setting button to switch between the five display states of [for Time] [Date] [Temperature] [Voltage] [Alternate Cycle Display]. Long press: In the normal display state, press and hold the setting button for more than 2 seconds, the for time/date/year/parameter setting will be entered. "Minute" starts to flash, short press the setting button to adjust the value. After adjusting, press and hold the setting button for more than 2 seconds. "Hour" starts to flash, short press the setting button to adjust the value. Then press and hold the setting button for more than 2 seconds to enter the date adjustment [note that the colon in the middle is not lit], the "day" starts to flash, after adjusting, press and hold the setting button for more than 2 seconds, "month" starts to flash, after adjustment Press and hold the setting button for more than 2 seconds. "Year" starts to flash. After adjusting, press and hold the setting button for more than 2 seconds to enter the extended parameter setting. After entering the code function setting, it is also possible to press the setup button for more than 2 seconds to skip to the next parameter setting. Short-press the setup button to adjust the parameter value. Refer to the following table for the meaning of the code: Ac: Temperature 1 error calibration parameter. A positive number represents an increase, a negative number represents a decrease, and the unit is degree. The adjustment range is -5~5. For example, if you think that the displayed temperature is 1 degree higher than the actual temperature, then set Ac:-1 so that the electronic clock is automatically displayed after subtracting 1 degree. (Note: If you do not have a standard thermometer for reference, it is recommended to keep this item as Ac: 0) Dd: Display item during custom cycle display [dd: 0] for Time + temperature + voltage [dd: 1] for Time + voltage [dd: 2] for Time + temperature dF: Switching interval when the custom cycle is displayed, the unit is second, the adjustment range is 1~9. For example dF: 3, just The switching interval is about 3 seconds to switch display items. LL: Displays the brightness level, the adjustment range is 1~5, LL: 1 is the darkest, and LL:5 is the brightest. AL: Automatic brightness control switch, AL:0 is the automatic brightness control, AL:1 is the automatic brightness control. When set to AL:1, the electronic clock will change the brightness to level 1 after 19:00 PM every day. After 7:00 AM every day, the brightness will be changed to the luminance level in the LL option. 0.0u: The voltage measurement error is corrected. A positive number indicates an increase, and a negative number indicates a decrease. For example, the actual supply voltage is 12.0V, but the table shows 11.9V, then it is adjusted to 0.1u. After adjusting the AL option, press the SET button for more than 2 seconds at the end. After returning to the normal display state, all parameters and for time settings can be saved.