One of the best mini multimeters you can buy! Our Anti-Burn Intelligent Digital Multimeter has automatic identification design. Connect the test leads in parallel with the circuit, the power supply and the resistor under test. The meter automatically identifies whether it is AC voltage, DC voltage or resistance and displays the frequency on the screen. OUR GUARANTEE We are confident that we offer some of the best products on the market. Therefore, we provide a 30-day guarantee. We will make every effort to ensure that you are completely satisfied with your purchase. Online shopping can seem daunting. We want you to know that there is absolutely zero risk of purchasing something. We won't make it difficult if you don't love it. We offer email and ticket support 24 hours a day, 7 days a week. If you require assistance, please contact us. Please contact customer service if you have any problems with your purchase.