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 Plastic Measuring Range:1.5VAA/AAAdry-battery,1.5Vbutton-battery cannot check 3V batteries,9V,6F22 batteries Function: Battery-tester Package List: 1 * Tester