Features: ~Automatic tuning frequency control ~Most-fet power control ~With Overload Protection & buzzer ~Power led variable adjust Series VCO Model KWS0635 KWS1520 KWS2020 KWS1815 KWS2615 Output(w) 600 1500 2000 1800 2600 Frequency(KHz) 35 20 15 Line Source 220V 1P 10A 220V 1P 12A Control Auto Tunning Overload Protect Overload Protect & Alarm Buzzer Air Cylinder 32Ф 63Ф 80Ф 63Ф 80Ф Workpiece Max.Height 200mm 360mm 340mm Generator Dimension 240L x 500W x 330mm H 210L x 500W x 330mm H Machine Dimension 340L x 480W x 760~1020mm 370L x 670W x 980~1320mm Generator Weight 18kg 16kg Machine Weight 30kg 80kg Welding capacity 20x50 65x160 90x160 40x210 114x240