Feature: 1. Handheld mini diamond selector II for testing real or fake diamonds. 2. Specially designed for fast, easy, and accurate testing without damaging the diamond. 3. Portable electronic diamond tester can be used to test diamonds, crystals, jade, gemstones, etc. 4. It emits audible sounds so you can distinguish between real diamonds. 5. LCD display and LED indicator to provide accurate reading. Specification: Features: Handheld mini diamond selector II for testing real or fake diamonds. Specially designed for fast, easy, and accurate testing without damaging the diamond. Portable electronic diamond tester can be used to test diamonds, crystals, jade, gemstones, etc. It emits audible sounds so you can distinguish between real diamonds. LCD display and LED indicator to provide accurate reading. Specifications: Power supply: DC 9V Battery × 1 (not included) Material: Alloy, plastic Color: Black Item weight: 66 g / 2.3 oz Package weight: 130 g / 4.6 oz Item size: 16 * 4 * 2.3 cm / 6.3 * 1.6 * 0.9 inch Note: 1. The thermal conductivity meter is an electronic instrument specially designed and manufactured according to the thermal conductivity of diamonds to identify the authenticity of diamonds; 2. The tester is a precision electronic instrument, the operating environment should be 5-35 degrees Celsius and the relative humidity should be below 80%; 3. The diamond to be tested must be clean, dry, and at room temperature. Packing list: 1 * Diamond tester 1 * Leather case 1 * Testing platform 1 * User manual Packing list: 1 * Diamond tester 1 * Leather case 1 * Testing platform 1 * User manual