1、Compact Design: This gem tester possesses a compact design, and it will tell you difference between a real diamond and a fake diamond. 2、High Accuracy: This gem tester features easy operation and high accuracy, which ensures high reliability. 3、Stable Testing: This gem tester comes with a housing and a small test platform for securing loose gems. 4、Portable Size: This gem tester is small in size, which is very convenient to carry, and you can take it to wherever you want. 5、Widely Used: This gem tester is not only suitable for diamond detection experts, but also suitable for diamond enthusiasts novice. 1 x Diamond Tester1 x Cover1 x Tray1 x Leather Storage Bag1 x User Manual Item Type: Diamond TesterMaterial: PlasticBattery Model: AAAA Battery (Battery Not Included)Purpose: to Measure Whether the Gem Reaches Sapphire LevelProduct Size: Approx. 160 x 40 x 20mm / 6.30 x 1.57 x 0.79in ( Manual Measurement, Slight Error May Exist )