Luminous design: luminous clock points and digital display can give you a clear view even in the dark night, really convenient to use and protect your driving safety to some extent; (Provide ample lighting during the day and glow at night) Size Information: mini clock with diameter of 1.57 inch, will never take up much room, and well matches with your car other decorations, allows you to know time when driving with no need of glancing at your watching or cell phone, ensures safer driving experience Quality product: featured with quality steel and built with electroplated process, solid, sturdy and hard to fade, rust and corrosion resistant, wear and tear resistant, supports a long time application Help You Know Time: how to set the correct time: pull the little dial out that is on the side of the clock, then turn the dial to set the correct time; When done, push the dial back in; How to replace the battery: use a blade to pry open the back cover, use tweezers to remove the battery and replace it with a new one; Install the back cover after normal operation; Please pay attention to safety when replacing the battery Practical and delicate: exquisite workmanship, nice decoration for your car, it also can be well applied in your home or office, really practical and convenient to use