Open box. Never used. The TOPDON BT600 Plus is a heavy-duty battery tester and analyzer designed for 6/12V/24V batteries. It features a built-in 5200mAh battery capacity and a voltage measurement range of 0.000V to ±100V. The device offers cranking and charging tests for various battery types including flooded, AGM, VRLA, gel, and lead-acid. With a 3.5" color screen and built-in printer, this product is easy to use and provides professional results. Additionally, it comes with a carrying case, clamps, and has safety features such as reverse polarity protection. Perfect for car, truck, motorcycle, ATV, SUV, boat, and yacht batteries.