1、Using STM8S005 as the main control, built‑in program, you can directly use the welding lamp. 2、Using imported high‑precision clock chip, the error is less than 1 minute per year. 3、This DC Control Circuit Board uses the integrated IC driver and the screen is more stable and reliable. 4、Support seven‑color display clock ,including RGB lights, and 24‑hour mode time display. 5、Its function includes 24‑hour mode, time display, anti‑virus program (Update the monitor every 10 minutes ), no alarm, not support remote control, No time switching machine. 1 x Circuit Board2 x Acrylic Board8 x Screws8 x Nuts Item Type: STM8S005 DC Control Circuit BoardMateial: PCB, AcrylicInput: 5 VBattery Model: CR1220 Battery (Not Included)