This practical battery tester can provide you with great convenience in circuit testing. It is mainly used to test the voltage and capacity of batteries and can be widely used in laboratory research and battery research, development, and production testing.SpecificationColor: GreyMaterial: PlasticTester Model: BT-189Suitable For Battery Model: AAA, N, D, 9V, Button cell, 1.2-4.8VOverall Size: 9.2x6.2x1.4cm / 3.6x2.4x0.55 Inch (L*W*H)Packing List: 2 x Digital Battery TesterAdvantageIt is made of an insulated plastic shell for easy operation without batteries, and it is light and compact for easy portability.