Features: This car automotive-relay tester is a must-have tool for any car owner or mechanic, with its ability to detect 4 pin/5pin automotive-relays and work with 12/24v voltage. With 2 large capacity 18650 mode-batteries, this portable test equipment can be used continuously without the need for an external power supply, making it perfect for on-the-go repairs. Suitable for-drivers, mechanics-, and anyone who wants to take control of their car maintenance, this automotive-relay tester is easy to use, providing accurate measurements and quick-results. Whether you're in-the garage or on the road, this circuit tester is small and easy to carry, making it ideal-for being placed in briefcases or satchels for quick-access to diagnose any car-issues. Made of high-quality abs material, this car relay tester is durable and reliable, ensuring that you'll have a useful and long-lasting-tool in your-arsenal for all of your automotive-needs. Specifications: Material:Plastic Size:Approx.9.7x2.7x20cm/3.81x1.06x7.87inch Color:Black Working temperature: -20~+50 Note: .Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. .Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thanks for your understandings. Package includes: 1x Car Battery CheckerProducts from GuanGuan's store