Specification: Board size: 70 x 57MM Thickness: 1.6mm Board material: standard plate, blue solder mask, all solder pads are tin-plated, high-strength fireproof and anti-drop material, which can be repeatedly disassembled. Size: 70 x 57mm Sheet: FR-4 tin plated Material: PC+Metal Color as shown SMD components: 149 Soldering point: 444 The full process circuit board is the same as the competition board. There are 10 types of SMD components for welding, 129 pieces in , and corresponding test points are set. Component list: Resistance type---Package is 0805 (60 pcs) Resistance type---package is 0603 (10 pcs) Light-emitting diodes---packaged as 0805 (10 pcs) Exclusion class---packaged as 0603 (5 pcs) Capacitors---packaged as 0805 (10 pcs) Diodes--packaged as 1206 (10 pcs) Transistor type--packaged as SOT-23 (10 pcs) Integrated chips--packaged as SOP-8, SOP-16 (2 pcs) Resistor or capacitor type---package is 0402 (10 pcs) Integrated chip type-packaged as LQFP44 (2 pcs) Package Contents: 1 x Full patch welding practice board Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.