Features: Compact size, lightweight and portable, easy to carry around with you. LED display, you can see the delay time, pulse time, and pluse numbers clearly. 20 gears of delay time adjustment, easy to adjust from 1-20ms. 30 gears of power adjustable and 4 gears of pulse adjustable(1-4pu). Equipped with 5minutes automatic power off function. With power indicator light, you can know the remaining electricity quantity at a glare, and convenient for you to recharge it in time. 1 green light indicate (10-25% remaining electric quantity), 2 green lights indicate (25-50% remaining electric quantity), 3 green lights indicate (50-75% remaining electric quantity), 4 green lights indicate (75-100% remaining electric quantity). Automatic trigger s-pot welding, the welding spots are accurate and beautiful, support welding 0.1-0.2mm nickle sheet or steel sheet. Built-in high-rate polymer power cell, support continuously weld thousands of points after being fullyrecharged. With fast-recharging function, which can be used as recharge pal and the max output current is 2.4A. Integrated cold-compacting welding pen, with fine conductivity and low contact resistance, and easy carrying. Two types optional, you can choose 5300mAh or 10600mAh according to your demands.