1. Various types of battery testing with a wide range and practical functionality 2. Supports multiple battery models; wide test range includes C, AA, AAA, D, N, 9V (6F22) batteries and 1.5V button cells Compatible battery types: 9V: PP3, MN1604, 6F22, 006P; 1.5V: AAA, AA, N, C, D, and button batteries including MN2400, MN1500, LR14, MN1300, R20, and others 3. Easily test batteries without installation avoid wasting usable batteries 4. Battery power tester allows quick and direct testing 5. Compact and portable design for easy carrying and storage Purpose: Battery power tester Function: Durable and reliable performance Note: Product appearance, color, and printed characters may vary slightly between batches, but this does not affect functionality Color: Black Material: ABS Package Contents: 5 x Battery Testers Note: Light reflection and different displays may cause the color of the item in the picture to appear slightly different from the actual product. Measurement error allowed is +/- 1-3 cm.