1. Pocket size, portable and handling 2. Test without damage, convenient and accurate operation 3. Work power: DC 9V battery 4. Low electricity consumption, warning and indicating functions if the battery just has low electricity. (Indicate with red light) 5. Ten minutes late since the last test, the power indicator light (green) turns off automatically and sends out "DUDU" sound for a long time to warn the user to turn off the tester 6. For measurement of moissanite, the window marked MOISSANITE will light up together with and audible "Continuous" beep; For measurement of diamond, the DIA window will light up 7. Size: 160 x 40 x 22mm 8. Weight: 60g
