Product selling point:1. Using high-quality materials, the quality is guaranteed2. Ultra-thin power display, 5 LED indicators, the display is more direct and beautiful3. Wider range of use, lithium battery, lead-acid battery, lithium iron phosphate can be used4. The appearance of the product is small and easy to use5. Simple operation, suitable for all kinds of peopleInstructions:1. Connect the positive and negative terminals of the display board to the positive and negative terminals of the battery under test, press the red button lightly with your finger, the LED light will light up, and the real-time battery level will be displayed2. Release your finger, the LED light will go out after a delay of 3-10 seconds, and it will not consume power at all when it is static.3. With the reverse connection function, even if the positive and negative connections are reversed, it will not burn out. You only need to adjust it in time to continue using it.Specification:Size: 6*1.5*0.3cmPackage Included:1* Battery indicator