intended to improve the level and the welding speed.WE W,specially designed patch welding practice board, 

• Board size: 80 * 60MM
• Board thickness: 1.6mm
• Material: international standard plates, the pad all the tin, with a high-intensity fire material that can be repeated disassembly.
• Circuit Voltage :3-12V
•  PCB board design is reasonable, no flash, size 60 * 80MM, fits in your pocket.are commonly used for patch element.
• Around the three elements are used to practice welding, each column with test points.intermediate water circuit is a circular lamp circuit, the CD4017, NE555, light-emitting diodes, power can work after welding is correct.on the back of the circuit is also used there is a scale for easy measuring element. There are instances of PCB traces, PCB design and convenient to use.