High quality PCB, has clearly marked the electronics components, even beginners can easily solder successfully.
This practical practice board is easy to assemble and soldering, exactly suitable for the electronic learner and school teaching.
Note:
Please make sure all components in right direction and right place; and check whether pseudo and float welding, this is very important in practicing and testing.
Before soldering the LEDs, it is recommended to use a multimeter to check if there are any LEDs that are not bright.