Review on 🕰️ Enhanced DAOKI C51 DIY Kit: 4 Bits Digital LED Electronic Clock Production Suite with Improved SEO by Jarom Bulles

Very easy to assemble for anyone with even minimal soldering skills. My only criticism of the (optional) backup battery connection is that the screen printing swapped the GND and + connections. Fortunately, the electronics are protected by a diode, so an accidental change of direction will not damage the device. The instructions are in Chinese only, but it only took a few minutes to figure out the controls. It should also be noted (and probably described in the Chinese instructions) that the +buzzer terminal is the longer of the two wires coming out of the device. If you reverse the buzzer, it won't work.