to operateQuick measuring of battery voltageDigital display of testing resultsPortable, small and exquisiteFunctions:Can be used to test following battery size:for 9V, D type, C type, AA, AAA, 18650, Battery ,button battery,Specifications:Type: DigitalVoltage range:12VTemperature range:40 CelsiusInternal resistance measurement range:10m ohmProduct weight: about 42gStandard accessories: meter (no battery needed)Instructions:1.9V battery test: put battery into the two test holes on the side.2.Other battery types test: open the test arm, clip battery into the test arm.colour: blackMaterial: ABS + electronic componentssize: 110.8 * 60.5 * 25.5mmPackage Contents: 1 x BT168 Pro Smart LCD Digital Battery TesterNotice:1.The will display on screen2.Pay attention to positive and negative pole test.Only the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.