Audio Portable Diamond Selector III Tester 2x AA Batteries

1) Diamond Selector III is a compact electronic device for distinguishing real diamonds from other simulated stones. It is designed for quick precise and safe diamond testing 2) Light weight and ultra-compact (with a size of credit card) 3) LED light and audio result indication 4) Accurate and reliable reading 5) Metal alert 6) Simple calibration for stones of various sizes 7) Convenient carrying case 8) Testing platform for loose stones 9) Testing capability: Diamonds / Diamond simulation (e.g.CZ) / Metal 10) Auto off: N/A 11) Initial warm up: about 20 seconds 12) Indicator: Audio and LED lamps 13) Power supply: 2 X AA batteries (not included) 14) Size: 84 x 53 x 14mm 15) Weight: 40g