Brass Spot Welding Pen - Material and construction: The welding pen is made of brass, with a detachable head for easy maintenance and tip replacement. Size and portability - Size: approx 15.5 cm x 7.9 cm x 3.4 cm (6.10 inches x 3.11 inches x 1.34 inches) - Compact and portable design for convenient use in small workspaces or on the go. Easy to use and reliable performance - Power and welding capability: USB rechargeable with a 1200 A strong current discharge for stable welding. - Durability and efficiency: After a full charge, you can weld thousands of spots, making it suitable for repeated use in projects. Display and monitoring - Color display: 1.8 inch color screen shows welding status, battery voltage, temperature, preheat time, pulse time, interval time, charging voltage/current/power. - Indicators: Over temperature, low voltage, and short circuit warnings are clearly shown for safe operation. Practical applications - Battery pack assembly and repair for small electronics and DIY projects. - Spot welding of thin metal components, connectors, and tabs in prototype or hobby work. - General small-scale welding tasks where a compact, USB-rechargeable spot welder is advantageous. Note: This description preserves the original product features, including material, detachable head, exact size measurements, USB rechargeable capability, 1200 A current, and the 1.8 inch color screen with the specified monitoring and warning indicators.