Features: 
1) With optional different types of spot gun or tool packages, different function 
    can be realized: 
    a) One side / double sides spot welding
    b) Screws / rivets spot welding and refinishing
2) Continuous accurate parameters adjustable for electricity time, welding
    current and more
3) Main circuit switch durable and reliable, output current stable
4) Welding/adjustment switch, easy for spot gun first positioning
5) Strong current, short pulse working manner, simulating capacitor storage
    welding result
6) Can be connected to STUDDER kit, manual spot gun
7) Continuous single spot welding and pulse single spot welding to high spot
    metal sheet
8) All spots distibuted averagely