Feature: 1. HIGH BRIGHTNESS: Jade appraisal light has high brightness and high penetration, allowing you to see the internal structure of jade stones very clearly. 2. POWERFUL LIGHT GATHERING: Identification flashlight for indoor or outdoor use, you can easily see your surroundings in the dark. More powerful light gathering. 3. LONG LIFE SPAN: Jade detector lamp is made of 18650 lithium battery, which has a long life, energy saving and does not require frequent battery replacement. 4. RUGGED AND DURABLE: Jewelry identification flashlight is made of aluminum, sturdy and durable for long term use and more professional identification. 5. COMPACT AND LIGHTWEIGHT: Jade flashlight is compact and lightweight, can be carried in pockets, handbags, drawers, suitable for outdoor activities, such as travel, hiking, etc. Specification: Item Type: Identification Flashlight Material: Aluminum Product Size: Diameter: Approx. 22mm / 0.9inz Body Length: Approx. 130mm / 5.1in Power Supply Battery: 1 x 18650 Lithium Battery (Not Included) Light Source: White Light, Yellow Light, Violet Light 365nm Control: Tail Button Adjustment Gross Weight: 77g/2.7oz. Package List: 1 x Identification Flashlight (Without Batteries) Note: Please allow some error due to manual measurement.