Product description Function setting: long press set to enter the setting mode, press the UP key to change the parameters Time setting: After reset, it is 7:59:59 on January 01, 2019 (seconds are not displayed, the week is automatic) Time: 24-hour system (automatic), 12-hour system. Hourly reminder: You can set the hourly reminder and turn off the hourly reminder at night. (Default 7 o'clock to 21 o'clock) 3-way alarm clock: Alarm 1 is set from 7:00 and is turned on by default. Alarm 2 is set from 7:00 and is off by default. Alarm 3 is set from 7:00 and is off by default. Alarm clock control: Monday to Sunday alarm work (default) Monday to Friday alarm work Control brightness: Auto brightness (default) Fixed high brightness Fixed medium brightness Fixed low brightness Temperature display: Celsius (default) Fahrenheit 3 kinds of music: To Alice (default) Ode to joy Spanish bullfighter Color display: 4 nixie tube color optional Each nixie tube color is optional 4 nixie tube color cycle change (default) 4 nixie tube colors change randomly The color of a single nixie tube changes randomly Time correction: correct time error Display mode: Show time only (default) Time-temperature cycle display Time-date-week cycle display Time-date-day-date cycle display Parameter: Chip: IAP15W413AS, DS1302 Shell material: transparent plastic Power supply: USB power supply DC5V Size: 140*32*40mm Note: This is a clock kit, you need to assemble and weld it according to the drawings. Electronic knowledge is required, please purchase carefully. If the circuit board is damaged during the soldering process, the seller will not compensate. Hope customers understand. Package Contents: 1Set LED Electronic Clock kit DIY 4 Digital Tube Multicolor with Clear Case DC 5V