Car Relay Tester LED Indicator Light 12V 24V Alternator-Analyzer Diagnostic Tool Battery Powered Charging System Diagnostic Tool Feature:1. Eential Tool for Car:This car relay tester is a must-have tool for any car owner or mechanic. It can detect 4-pin/5-pin automotive relays and works with 12/24v voltage. Ensure that your vehicle's relays are functioning properly with this portable testing device.2. Convenient Battery Operation:This portable electronic automotive battery checker requires two high-capacity 18650 batteries (not included) to operate. With no need for an external power source, it offers continuous usage and is perfect for on-the-go repairs and mobile maintenance.3. Accurate and Fast Results:The alternator-analyzer diagnostic tool is easy to use and provides accurate measurement results quickly. Whether you're a driver, mechanic, or anyone looking to maintain control over your vehicle's maintenance, this tool is eential. Get reliable results in no time.4. Portable and Compact:Designed to be compact and lightweight, this electronic relay tester is highly portable. It easily fits in your briefcase or backpack, allowing for quick diagnostics of any car iues. Take it with you whether you're in the garage or on the road.5. Durable and Reliable:Made from high-quality ABS material, this car battery checker ensures durability and reliability. It will withstand heavy use and serve as a useful and long-lasting tool in your tools. Meet all your automotive needs with this dependable tester. Specification:Origin: Mainland ChinaProduct Size: 197.00x95.00x27.00mm/7.76x3.74x1.06inchBattery: 2x18650 batteries (not included) Note:Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you!Please allow 1-2cm measuring deviation due to manual measurement. 1 xCar Relay Tester