1. 99 gear power adjustable, digital tube real-time display gear 2. Real-time voltage monitoring protection, if the voltage is not in the range of 8-17V, UE is displayed 3. Real-time MOS tube temperature protection. When the MOS tube temperature exceeds 45℃, CE is displayed 4. Using 5 MOS tubes, spot welding peak current up to 1500A 5. 10AWG wire, alumina copper spot welding needle, ensure high current passing capacity and durability Pure copper conducts heat and improves spot welding efficiency. Product model:Z99 Operating voltage:12V Working current:100-300A Standby power consumption:Less than 0.5ma Thickness of welded nickel sheet:0.1-0.3mm(related to battery ratio) Peak welding current:1500A MAX Voltage requirement:25AH-60AH or high rate battery above 30C Note:Due to different production batches, the colors and styles of accessories are random and cannot be specified. Colour:As Shown Material:ABS Package Contents: 1 set * DIY spot welding machine 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.