Electronic Learning Soldering Kit 4-digit LED Talking Clock Project Kit with Speaker PCB

XUEMEI School Science Project: This product is DIY kits, not the end product This Soldering Project requires certain foundation of basic electronic theoretical knowledge and welding and hands-on ability. Functions: Hourly Chime Function, 12H/24H time display mode, Light Control Function Parameters: DC 5V; come along with a USB power cable, plug in the USB charger to use it. CR1220/CR1216 batteries are NOT included. With this digital talking clock DIY kit, you can make a clock by yourself. With transparent case, components can be well protected. Digital talking clock DIY kit for electronics enthusiasts. With transparent case, components can be well protected. Automatically display time, temperature, date and day. C/F selectable for temperature, 12H/24H time display mode. Large 4-digit LED display, can show you the time clearly. Light control, the clock will automatically be brighter during the day than during the night. Alarm function and hourly chime function. Warm white nightlight function by long-press the voice key. With a power cable for clock power supply. Display Modes: 1. Time/temperature/date/week automatically display circularly. 2. Time/temperature automatically display circularly. 3. Only display the time. Specifications: Display: 4-digit LED Display Color: Blue Power Supply: DC 5V; 1 * CR1220 Button Battery (NOT included) Case Size: 11 * 4.5 * 3cm / 4.33 * 1.77 * 1.2in PCB Size: 9.5 * 3.5cm / 3.7 * 1.4in The button battery is just used for memorizing the time when powered off, not power the clock(use DC 5V). Package List: 1 * Digital Talking Clock Kit The pcb don't need soder c0 circuit holes;