Feature: 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. Specification: Item Type: Nixie Tube Clock Material: ABS, Acrylic Memory Function Power Supply: 1 x built in CR2032 button battery with 250mAh capacity: Display Mode Settings: RGB full color clock supports multiple cool display modes, which can be accessed through 4 button free switching. Mode 1: Time Adjustment Mode Mode 2: Month Day Adjustment Mode Mode 3: Separate Color Adjustment Mode Mode 4: Colorful Fast Gradient Mode Mode 5: Breathing Mode Mode 6: Colorful Flowing Mode Mode 7: Burst Mode Mode 8: Stop Watch Mode Mode 9: Flip Mode. Package List: 1 x Nixie Tube Clock1 x Power Supply Cable