This is a kind of good quality welding pen set, adopts intelligent logic control chip, can intelligent calculate battery power, suitable for welding various kinds of batteries. 6 gears with output power adjustable, 6 gears with battery capacity adjustable and 6 gears with multiplication power adjustable, the welding process is more accurate. The welding spots are accurate and beautiful, support welding of 0.1-0.3mm nickel sheet. Supports 100-900A welding current. You can give it a try. Type 1 Features: Adopts intelligent logic control chip, can intelligent calculate battery power. It uses 6pcs MOS pipe, in place, for welding in peak hours, the current can be up to 1800A.4 channels LED display, integrates four main functions of capacity, which, equipment and power warning.6 gears with output power adjustable, 6 gears with battery capacity adjustable and 6 gears with multiplication power adjustable, the welding process is more accurate. The welding spots are accurate and beautiful, support welding of 0.1-0.3mm nickel sheet. Supports 100-900A welding current. Upgraded to automatic triggered design, no longer need to nap for a long time, completely free your hands. It will be automatic sleep after 8 minutes without surgery. The 380mm long welding pen has low resistance and good electrical conductivity. Comes with a 2m 0.1*10mm nickel-plated steel roll. Recommended battery: 12V-30-65ah lead-acid battery with excellent performance and small internal resistance.4000-10000mah, 30-70C, 2S, 3S, 4S (less than 16V) lithium polymer battery group.30-35ah 18650 lithium battery group. Specifications:Name: welding tool setMaterial: metalSystem voltage: 6.5-16VPoworking Line: 100-900A p-eal source: 1800A maxItem size: 107*53mm/4.21*2.09inPackage size: 120*70*10mm/4.72*2.76*0.39inPackage weight: 100g/3.53ounce Packing list:1*circuit board2*welding pen2*heat shrink tube2*connection cable1*nickel sheet roll4*screw set By the way, if you like our store, please add our store to your favorite stores. You can get our new arrival and discount information in time. Type 2 Features: Pure copper conductivity and thermal conductivity, improve spot welding efficiency. 10AWG wire, aluminum oxide copper welding needle, for high current and durability. Positive and negative signs, not easy to connect the wrong line. High-frequency capacitor, low internal resistance, high temperature resistance.8-speed power regulation, digital tube-shaped hardware real-time display. Specifications:Main Color: GreenMain Material: MetalPackage Size: 130*80*40mm/5.1*3.1*1.6inPackage Weight: 195g/6.9ouncePacking List:1*PCB1*5m nickel sheet2*connection wire2*welding space4*screw sets2*heat shrink tube 1. We ship worldwide by China post,HK post EMS,DHL, Fedex and so on according to your choice when you place orders. We are not able to control the time because it is processed by an external service. 2. If you have not received the item after 45 days, please first, and do not open a dispute directly, we will solve it quickly and in the best way. 3. Due to stock status and time differences, we will choose to ship the item from our first available warehouse to the fast . 4. The transit time service is provided by the carrier and does not include weekends and holidays. Transit times can vary, especially during the holiday season. 1. If you are satisfied with our products, please give us 5 stars positive feedback. Thank you very much.2. If you are not satisfied with our products, please first. We will try our best to solve the problem. 1. You have 7 days to apply and 30 days to return it from the date you received it. If this item is in your possession for more than 7 days, it is considered used, and we will not issue you a refund or exchange. There are no exceptions! The shipping cost is borne by both the seller and the buyerin half. 2. All returned items must be in the original packaging and you must provide us with the tracking number of the shipment, specific reason. 3. We will refund your full winning bid amount, upon receipt of the item in its original condition and packaging with all components and accessories included, after both buyer and seller cancel the transaction with