Features:1. Purpose: This battery tester is used to start a lead-acid battery and check the following conditions of the battery, starting, charging and loading.2. Easy to operate: The tester is exquisite in design, easy to operate, accurate in readings, and complete in functions.3. Display data: It provides readings on the large LCD display and passes sound and light prompts during testing.4. Data collection: It uses the 4-wire Kelvin method to complete a series of complex data collection, thereby calculating each test data through the built-in precision circuit and an improved digital processor.5. Safety protection: Some improvements have been made to the circuit, including polarity reversal protection, overvoltage input protection, and loose lead detection to ensure safety and convenience during testing.Description:This is the best tool in the field of battery sales, vehicle maintenance and battery inspection in equipment systems related to lead-acid starter batteries.Specifications:Material:metal,plasticLED quantity: 6 (2 red, 3 green and 1 yellow)Material of wire: 0.06square millimeter copperMax. voltage and current: 12V 15ALength of wire: 27cmBattery tester size: 12 * 5.2 * 1.