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/1jGCOAxC
With English manual in the package

Technical Details

Product Details

Product Dimensions

Package Dimensions
Width : 3.4 inch
Height : 0.4 inch
Length : 5.3 inch

Item Weight: 0.8 ounce (View shipping rates and policies)
Shipping Weight: 0.8 ounce (View shipping rates and policies)

ASIN : B00Y20JYTM