DIY SMD SMT Welding Practice Soldering Skill Training Board Led Running Water Light Kit DIY KIT           After welding, just connect electricity (3-12V) to see the effect. You can quickly judge the welding effect. The welding product is a beautiful water lamp circuit.    The back of the board with mm/Inch ruler, Easy to measure component    It's DIY Kits, Red Led    English Manual down from links: http://pan.baidu.com/s/1jGCOAx         Beautiful water lamp circuit      The welding product is a beautiful water lamp circuit    This is a great little training kit for those who want to get a feel for SMD solderingComplete accessories        It contains a PCB with 2 sides, English instructions and all the components needed      The PCB board has clearly marked the electronics components, it's easy to assemble             Complete accessories          It contains a PCB with 2 sides, English instructions and all the components needed      The PCB board has clearly marked the electronics components, it's easy to assemble           Improve the welding skills          The solder learning kit has proper circuit design with led indicator, easy to check your soldering result, them will be a flashing LED light after soldered and powered with 3-12V, very interesting effect           Convenient measurement design          The back of the PCB board is marked with mm/in scale for easy measurement of components, and also marked with PCB line width example, can be used as a design PCB reference      PCB Size: 85.6mm(L)x 54mm (W) x1.6mm (H)      Operating Voltage: 3-12V             This is red Led, we also have blue Led version, ASIN is B00VWB8F8K      The product is used for learning. Suitable for people who want to improve the welding skills.      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.      Comes with English user manual and online file, which will guide you how to finish step by step. If you need technology supports, or meet other problem, please send e-mail to us, we will help you as soon as possible.