ITEM NAME:2 in 1 Vent Outlet Clip On Car Blue LED Backlight Digital Temperature and T E4Q4 2 in 1 Vent Outlet Clip On Car Blue LED Backlight Digital Temperature and T E4Q4 Steps for setting time: You just need to press the button "A" for three seconds to adjust the "hour", and "B" is for which hour number you need to adjust . Then press "A" for adjusting the "minute" ..and press "B" for the time you want .. Finally press "A" to confirm the time .. then the clock will show the correct time. When you are using "B" to adjust the time you can press "B" for a long time to accelerate the passing of the numbers. Press the A button three seconds, then use B button to adjust the hour number. Then press the B button three seconds, use B button to adjust the minute number. Press A button to get into the displaying mode. 100% brand new and high quality Normal time LCD display,digital temperature display. Please take out batteries and reload it again. if display is abnormal, and time need to be reset. Has a blue back light switch so you can easily check the temperature at night and reads in Celsius.By the way,blue back light maintaining 5 seconds. Add some functional style to your car or desk with this barrel-shaped digital thermometer which will look great whether it's sitting on your dashboard or on top of your PC's monitor. Material: LCD screen + plastic Color: Black, Backlight is Blue Light Dimensions (length x diameter): approx 82*18mm Package Contents: 1 x Car Clock Thermometer(including 2*Button) Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm..Color: Black, Backlight is Blue Light. Has a blue back light switch so you can easily check the temperature at night and reads in Celsius.By the way,blue back light maintaining 5 seconds. Press the A button three seconds, then use B button to adjust the hour number.