Feature:1. BATTERY POWERED: Gemstone flashlight is powered by a 18650 lithium battery, which is long lasting, energy saving and environmentally friendly, and does not require frequent battery replacement.2. PREMIUM MATERIALS: Gem identification flashlight is made of aluminum and stainless steel for rugged durability, which could be used for a long time. More professional identification.3. INDOOR OR OUTDOOR: Jewelry flashlight is designed for indoor or outdoor use. With this flashlight, you can easily see your surroundings in the dark. More powerful light gathering.4. COMPACT SIZE: Jade appraisal light is compact and lightweight and fits in your pocket, handbag, and drawer, which is suitable for outdoor activities, such as traveling, hiking and etc.5. HIGH PENETRATING POWER: Jewelry test flashlight has a high brightness and high penetrating light that allows you to see the internal structure of the jade stone very clearly.Specification:Item Type: Gemstone FlashlightMaterial: Stainless Steel, Aluminum AlloyProduct Size:Length: Approx. 135mm/5.3inHead Diameter: Approx. 15mm/0.6inTail Diameter: Approx. 24mm/0.9inSpotlight Head Diameter: Approx. 5mm/0.2inPower Supply Battery: 1 x 18650 Lithium Battery (Not Included)Light Source: White Light, Yellow Light (Optional)Light Beads: 1LEDControl: Tail ButtonGross Weight: Approx. 140g/4.9oz.Package List:1 x Gemstone FlashLight (Battery Not Included)Note:Please allow some error due to manual measurement.