Features:*1. Battery Testing Assistant: compact and portable, high sensitivity, fast reaction speed, simple and convenient operation.*2. Basic Battery Parameters: such as voltage, internal resistance, cold start amplifier and AH capacity, battery health, and charging state.*3. Always Ready To Use: Clamp the alligator clips and start battery testing. Built-in anti-reverse protection helps you connect two clips correctly.*4. LED Display Screen: with backlit, enabling you to clearly see the measured values in the dark, making it easy to read.*5. Widely Used: Suitable for automobile and electric vehicle maintenance, as well as household and enterprise vehicle maintenance and repair.Description:*1. Model: BT-171*2. Material: ABS*3. Test Method: positive and negative alligator clips*4. Test Voltage: 12V*5. LED Indicator Light: red/yellow/green/blue/white/colored lightPackage Includes:1 x Battery Tester1 x Instructions