May be used to test the following sizes: 1.5V, AAA and 9V. Product Description@ For 1.5v and 9v batteries, read off upper scale. @ For 1.5v miniature cells, read off 'button battery' scale. @ May be used to test the following sizes: 1.5V, AAA and 9V. @ Dimensions(H-P-I): 110 × 60 × 25mm @ Weight: 48g