Features: This battery tester utilizes advanced internal resistance measurement technology to quickly evaluate 12V/24V automotive, truck, and motorcycle battery health without removal, making it ideal for both DIYer users and professional mechanics. Featuring a clear LCD screen displaying real time voltages, internal resistance, and readings with 99% accuracy in 3 seconds, its button layout ensures effortless operations for immediate battery diagnostics. Designed for vehicle owners seeking preventive maintenance and repair shops requiring efficient battery analysis tools, it serves as an essential car battery internal resistance tester for routine check up and professional servicing. Perfect for garage diagnostics, roadside emergencies, and seasonal battery preparation (especially winter cold starts and heat stress), this portable battery diagnostic tool ensures vehicle operations in extreme temperatures. Built with ABS engineering plastic for impacts resistance, its compact design combines dust/water protections with durability, outperforming standard plastic testers in harsh workshop environments. Specifications: Component:ABS voltages: 12V/24V Test ranges: 3AH - 200AH voltages measurement ranges: 8-30VDC Display: 2.7inch LCD screen Color: Red,Yellow Package Includes: 1Set Car Battery Tester note: Please allow 1mm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual color of the item.