Feature:1. Battery Power Supply: Powered by a 18650 lithium battery (not included), long lasting battery life, energy saving and environmental protection, no need to replace the battery frequently.2. Aluminum Alloy Stainless Steel Material: The jade identification flashlight is made of aluminum alloy and stainless steel material, which is sturdy and reliable.3. Indoor and Outdoor Use: This jade identification flashlight is designed for indoor or outdoor use. With this flashlight, you can easily see your surroundings in the dark.4. Portable: Jade identification flashlight is a compact, lightweight, suitable in pockets, handbags, drawers.5. Professional Design: Equipped with a 5mm spot light head, suitable for small volume gem identification, with strong penetrating power, and bright white or yellow light (optional) light, allowing you to clearly see the internal structure of the jade.Specification:Item Type: Jewelry Identification FlashlightMaterial: Stainless Steel, Aluminum AlloyProduct Size: Approx.Length: 135mm / 5.3inHead Diameter: 15mm / 0.6inTail Diameter: 24mm / 0.9inCondenser Head Diameter: 5mm / 0.2inPower Supply Battery: 1 x 18650 Lithium Battery (Battery Not Included)Lamp Beads: 1LEDControl: Tail ButtonWeight: Approx.140g / 4.9oz.Package List:1 x Flashlight