Features:Power indication: the detector shows that red indicates that the power is exhausted, yellow indicates that the power is too low, and green indicates that the power is sufficient.Support a variety of models: this detector has multiple functions, which can quickly identify the positive and negative electrodes, n-type-batteries, 1.5V batteries.Material: this detector adopts ABS insulated plastic shell, which is light, small and convenient to use.Easy to Use: Just take out the tester and use it in your work, a very convenient tool for you. Rust Proof: This tester adopts high quality material which will avoid rust well.Note: Cannot measure-the-rechargeable-battery.Speciifiications:Material: ABS PlasticMeasuring Range:1.5VAA/AAAdry-battery,1.5Vbutton-battery cannot check 3V batteries,9V,6F22 batteriesFunction: Battery-tester Package List:1 * Tester