SUNKKO 737G+ welding machine with dual mode pulse welding.Mode 1: Manual pulse welding with attached pen for welding large areasMode 2: Spot welding with touchA great item for welding batteries. It gives you the ability to spot weld with intelligent frequency conversion in two modes.Heater has pulse and current display, and welding pen is included. Specifications:*Heater:Input voltage: AC 220 V ± 20 V, 50 HzPower: 4.3 kWWelding current: 120A-1200ATime of 2 pulses: 1-10 msTime of 4 pulses: 2-20 msTime of 8 pulses: 8-80 msWelding head thickness: 0.15-0.35 mmWelding pen thickness: 0.05-0.2 mmSize: 140x245x200mmNet weight: 7kg*Interchangeable welding penAdjustable blade distance: 2-7 mmTotal length of welding pen: (approximately) 580mmWelding wire area: 16mm²Tip size: Ø15mm X 7mm Features:* Color parameter display* High-power 70BN welding pen* High-speed pulse welding* High-speed welding of large battery area* Manual welding / touch welding modes* Intelligent welding pulse group settings* Welding material thickness up to 0,3mm* Energy saving* Intelligent digital controller with dual core Considerations for using SUNKKO 737G+ spot welder:1. In order to achieve a good welding effect, the spot welder should be plugged into a wall outlet to ensure stable power supply.2. Due to the momentary large welding current, the rated tripping current of the current switch should be 40-63A.3. Set the pressure regulator to the appropriate value.4. Keep the surface of the needles clean by cleaning them with sandpaper.5. Keep the tip of the welding needles sharp.6. When using the welding machine, there may be momentary flashes of light. The device uses high power and discharges high intensity immediately. Package includes:1 x SUNKKO S737G+ pulse welder1 x instruction manual1 x warranty card1 x welding pen S-.70BN1 x foot pedal4 x welding needle for head2 x welding needle for pen1 x Allen wrench2 x fuse1 x electric grinder1 x mold for 6 18650 batteries50 x nickel plate 100mm.