Features: The RC3563 battery internal resistance tester, measuring both internal resistance (1μΩ 200Ω) and voltages (0.0001V ±100V ) simultaneously with a 3 digit display, featuring four wire test clamps to eliminate contact resistance interferences. Equipped with a large LCD screen, and 1000mAh rechargeable battery, this portable tester offer 5 measurements/second, automatic ranging switching, and 10 minutes auto shutdown for low resistance components. For battery maintenance technicians requiring reliabled diagnostics in repair workshops, or academic research laboratories for performances validation. Ideal for real time battery health checks on production lines, resistance analysis of circuit components in electronics labs, or portable diagnostics during equipment maintenance. This tool supports three probe configurations for flexible testing scenarios while maintaining ±0.5% basic accuracy in harsh electrical environments. Specifications: Component: ABS Type 1: Tester Type 2: tester + probe Type 3: tester + battery holder Type 4: tester + probe + clamp + battery clamp holder Battery: 1 battery, 1000mAh (included) Resistance: 1μΩ~200Ω voltages: 1mV~±100V Size: 171x80x29mm / 6.73x3.15x1.14 inches Package Includes: 1 Set Digital Battery Internal Resistance voltages Meter note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you donot mind befores you order. 2.Due to the differences between different monitors, the picture may not reflect the actual color.