Fangrui Product Details This Welding Practice Board Aims To Improve Welding Level And Speed. Welding Skill Level International Standard Board, High-strength Fire-resistant And Anti Fall Material, Can Be Disassembled And Reassembled Repeatedly. Suitable For Students Majoring In Electronics And Electronics Enthusiasts Board Size: 80x60mm Board Thickness: 1.6mm Communication Interface: Spi Power Supply Voltage: 5v Power Supply Current: 800ma There Are 9 Major Categories Of Surface Mount Components For Matching Welding, Totaling 110 Pieces, And Corresponding Testing Points Are Set Up: 1.resistance Class - Packaged As 0805 (20 Pieces, All In Series, Total Resistance R1) 2.resistance Class - Packaged As 0603 (34 Pieces, All In Series, Total Resistance Of R2) 3.resistance Class - Packaged As 0402 (10 Pieces, All In Series, Total Resistance R3) 4.exclusion Type - Packaged As 0603 (6 Pieces, All Connected In Series, With Test Points) 5.capacitor Class - Packaged As 0805 (20 Pieces, All In Series, Total Capacity Of C1) 6.diode Class - P