This DIY 4 Digit LED Digital Clock is a customizable color clock, with each number able to be set as a favorite color or set to a different color gradient Aurora effect. It has 2 display modes, 13 colors and sound and alarm control function. Features: Super large 4-digit LED design: adopts high brightness 5050 color to display data clearly. Optional 13 colors: white, red, orange, yellow, light green, dark green, sea green, cyan, light blue, dark blue, purple, pink and light red. 2 display modes: displays time/temperature/date/week in cycles or displays time only. Touching Button: Uses it for the configuration menu (with voice feedback and LED backlight). 5 kinds of Aurora rainbow color gradient effect: can be set to all color gradient effects. 6 different types of animation switching effect: you can choose it according to your interests. Alarm function: it will stop automatically after two minutes or close by pressing the keys. 7 types of effects Digital change: you can choose the effect accordingly. Countdown function: the buzzer sounds at the end of the stopwatch. 4-level brightness adjustment function: can automatically adjust the brightness according to the ambient light or specify the brightness. 6-level information switching time: can display temperature/date/week according to preferences. Sound control function: You can wake it up by clapping your hands or knocking on the table. DS3231 Uses: Use it for RTC and integrated temperature compensated crystal oscillator, ultra high precision. Power supply: powered by DC 5V USB, the clock will remember the settings when the power is turned off. One function: 1. Press the setting key (circle symbol) + touch key (triangle symbol) to enter or exit the menu at the same time. 2. Short touch button (triangle symbol), can change the time setting (Time) - date setting (Date) - alarm setting (Alarm) - format setting (Format ) - setting animation effect setting (Display) - setting information Speed) - Setting mid-point colon bounce effect (Middle) - Color gradient effect (Color) - Gradient speed (Color Speed) - Voice switch setting (Voice) - Brightness setting (Brightness) - Duration Setting the digital dimming effect (moving) - Setting countdown (counting). Short press the setting key (circle symbol) to enter the setting, then change the parameter value by switching the key (triangle symbol). Features: Material: PCB + Acrylic Power supply: USB Voltage: DC 5V Finished product size: 19.9 * 8 * 1.5cm / 7.83 * 3.15 * 0.59in Product weight: 228g / 8.04oz Package size: approx. 20 * 8 * 3.5cm / 7.87 * 3.15 * 1.38in Package Weight: Approx. 245g / 8.64oz Note: Button cell not included. Package List: 1 * Digital Clock Kit 1 * USB Cable