1、Technology and Fashion: The clock has a built in stable chip, which has small time accuracy error, long lifespan, and rich and clear colors. Easy to operate buttons and DIY design. 2、Colorful Lighting: The RGB clock has 16 million colors, and each number can be adjusted to a different color, showng your unique taste and adding a beautiful scenery to your desktop. 3、Multi Adjustable Modes: The RGB full color clock supports 9 cool display modes and can be freely switched through 4 buttons to meet different needs at different times, giving you a good mood every day. 4、Power Off Memory: The clock is powered by USB and does not require batteries. The clock also has a built in button battery, which doesn't need to repeatedly set the time when the power is disconnected. 5、A Perfect Present: This nixie tube calendar with breathable RGB is perfect present for your friends and family on birthday, anniversary and more.