Describe:1. JUMBO DISPLAY - LCD screen with jumbo digits make it easy to read, and give you safer driving experience. You'll only need a glance to notice the date and time when you're on the move.2. STOPWATCH FUNCTION! - This clock also has the stopwatch function. A perfect add-on if you want to test your 0 to 100 km/h acceleration.3. STURDY MOUNT - The high-quality adhesive pad guarantees that the clock can be solidly attached to the dashboard, regardle of road vibrations or impacts.4. COMPACT & PORTABLE - It features a mounting bracket where you can slide the clock in and take it out on camping! Size: 2-1/2"x1-3/8"x9/16", powered by 1pc LR1130 cell battery (included).Time Setting:1.Pre DOWN until it displays Hour & Minute.2.Pre DOWN twice to show the month, then pre UP to set. Pre DOWN once to show day, then pre UP to set.3.Pre DOWN when the clock displays A/P, then pre UP to set hour. Pre DOWN once to show minute, pre UP to set, then pre DOWN to finish this step.If you want to set the specific parameter:Please pre DOWN serval times until it displays Hour & MinuteSet your desired parameter:MonthPre down twice to show Month, then pre up to set.Day: Pre down 3 times to show Day, then pre up to set.Hour: Pre down 4 times to show Hour, then pre up to set.Minute: Pre down 5 times to show Minute, then pre up to set.You can restart the proce by preing down until it displays hour and minuteMore features:Under the normal time mode:Pre UP once to show "month" and "day"Pre UP twice to use the 60-second stopwatch, pre DOWN to reset to zero. Pre UP to exist.Specification:Color: black, blueSize: 6.1*1.7*3.4cm/2.4*0.66*1.34inThe package contains:1pcs*car clock Thank you for your support!Welcome to buy from us!You can contact with us to get more detail of the goods .we will be ready to reply you ASAP.