Feature 1Battery 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. 2Aluminum Alloy Stainless Steel Material: The jade identification flashlight is made of aluminum alloy and stainless steel material, which is sturdy and long lasting. 3Indoor 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. 4Portable: Jade identification flashlight is a compact, lightweight, suitable in pockets, handbags, drawers. 5Professional 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. Item Type: Jewelry Identification Flashlight Material: Stainless Steel, Aluminum Alloy Product Size: Approx. Length: 135mm / 5.3in Head Diameter: 15mm / 0.6in Tail Diameter: 24mm / 0.9in Condenser Head Diameter: 5mm / 0.2in Power Supply Battery: 1 x 18650 Lithium Battery (Battery Not Included) Lamp Beads: 1LED Control: Tail Button Weight: Approx.140g / 4.9oz Package List 1 x Flashlight