* Battery Powered* Discover the authenticity of your gemstones with the DX-1 Diamond Tester. This compact tool features an easy-to-read display and is equipped with a variety of functionalities for accurate testing. Key features include: - Simple operation with an ON/OFF toggle switch - Lightweight design for easy handling - Quick response time for immediate results - Battery-powered for convenience - Compact dimensions: 137mm x 50mm x 30mm (5.39in x 1.97in x 1.18in) Perfect for both professionals and hobbyists, the DX-1 is a must-have for any gemologist or jewelry enthusiast eager to verify their gemstone quality.