Diamond Tester Professional Diamond Tester Pen with UV Light, High Accuracy Diamond Tester Pen & 60X Mini LED Magnifying, Jewelry Gem Tester Pen, Professional Diamond for Novice and Expert?Battery Included? This professional diamond tester pen is an essential tool for both novice gemologists and experienced jewelers. The built-in UV light adds versatility to your authentication process, helping distinguish between various gemstones. The tester includes a sensitivity adjustment feature and comes with a 9V battery for immediate use. Specifications: Probe Warm-up Time: about 25sec Working Time: about 5 hours for continuous use Suggested Working Temperature: 18°C to 30°C Size: 168 x 31 x 21mm Net weight: 55g Working Voltage: 1 x 9V, 6F22 battery (included the set) or AC adaptor 110V-240V, DC 9V 60X Microscope Magnifying Glasses: Bright LED light of the Magnifying Glass provides enough light at any dim conditions; The pocket size is convenience to carry, you can use it in everywhere With a Faux Leather Pouch, Can Protect it From Scratch, Attrition, Etc. Set includes: 1 x Diamond Tester Set 1 x Jewelry loupe 1 x English Instruction Manual Popular among professionals, hobbyists, coin enthusiasts, and business owners alike. Excellent tools. Excellent Value. Great gift idea.