... the tester.Pocket-size,portable and handlingTest without damage,convenient and accurate operationCompact design, low battery consumption ... switch for testing diamonds + - 8 pointsPowered: DC 9V battery X1 ( included )Supplied with: testing platform for loose ... stonesLeather Pouch Caseinstruction manualbatterySpecifications:Power: DC 9V battery x 1 Weight: 106g Interpreting the indication: Easy ...