1. 99 Adjustable Gears: With its 99 adjustable gears, this welding device provides precise and efficient welding performance for materials.2. Real-time Temperature/Voltage Display: This spot welder features a real-time temperature/voltage display and overheat/overvoltage protection function, making it safe and easy to use.3. Single Pulse and Double Pulse Modes: With single pulse and double pulse modes, this spots welding machine is suitable for welding different thicknesses of nickel sheets, providing flexibility and versatility in welding.4. Foot Control Function : The foot control function (exclusive to Pro version) makes welding work more flexible and user-friendly, allowing users to focus on their work more .5. Wide Compatibility: This handheld electric welding machine is compatible with cylindrical batteries such as 18650, 21700, 26650, and 32650, as well as phone and Ni- batteries, making it suitable for welding needs.Model Number: Spot WeldersWelding thickness: 0.2mm pure nickel, 0.3mm nickel plated, 0.4mm stainless steelCharging interface: 2 TYPE-C interfacesInput voltage: 4~5.4V, it can be used after charging to 4V, and can be used while charging capacitors: 2 in quantity, single parameter is 2.7V 3000FDelay trigger: 8 gears adjustable, 0.3 seconds-2.4 seconds (can be connected to the pedal, self-control trigger)Spot welding pen: silicone material, replaceable refill, the welding pen can be conveniently storedColour:black+redMaterial:ABStype:with Foot SwitchPackage Contents:1 x Farad Capacitor Spot Welder1 Pair x Spot Soldering Pens1 x Charging Cable1 Roll x Nickel Sheet (Length 5 Meters, Thickness 0.12mm, Width 5mm)Only the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.