rechargeable capability, fast charging, built-in welding ammeter, low power consumption standby, with silent mode. Strong Welding Capacity: The spots welding machine has two built-in high-rate power lithium batteries, and the single-chip CNC outputs a powerful pulse current for spots welding. It can firmly welds 0.25mm nickel-plated steel sheets and 0.15mm pure nickel sheets at full-charged. The welding process is more accurate and the welding spots are more solid and beautiful. Multiple Protections: over-current protections, short-circuit protections, low battery protections, over-temperature protections, over-temperature alarms, and with automatic shutdown function. Premium Welding Pen: 8 mm diameter, 400 mm length, 8AWG wire consists of multiple strands of high-temperature wire with high torsional resistance and more sensitive operation. Thick gold-plated interfaces with alumina copper spots welding needles to ensure high current passing capacity and durability Specifications: Name: Spots Welding Machine Set Material: printed circuit board Battery: 1 * 3.7V, 5000mAh battery (included) Input: 4.2V±0.05V Welding current: 6-800A Over current protections: 1.12KA Input voltage: 5.2V, 2.1A Output voltage: 5V, 2.4A Welding delay: 0.5-2s Continuous point interval: 0.8-1.2s Save voltage: 4.0-4.15V Shutdown voltage: 3.3-3.7V Screen brightness: 5-100.0% Active shutdown: 5-120min Alarm temperature: 50-75℃ Language: Chinese and English switch Storage temperature: 55℃ Storage humidity: 50%RH Welding thickness: 0.1-0.25mm Item size: 112 * 80 * 30mm / 4.41 * 3.15 * 1.18in Package size: 180 * 110 * 50mm / 7.09 * 4.33 * 1.97in Package weight: 390g / 13.76ounce Packing List: 1 * Welding Machine 2 * Welding Pen 1 * Nickel Sheet 1 * Type-C Cable