3 1/2 H x 1 W x 1 D.
Its digital readout displays the number of volts and color-coded indicators show whether the battery level is full, okay, weak, or empty.) About the size of a screwdriver, the tester stores easily in a kitchen drawer, glovebox, or tool chest..It tests AA, AAA, C, D, 9-volt, and button cell batteries, notifying one of the remaining voltages left and if a replacement is necessary.