Specifications: Strong in UV, but not strong in visible light. Great for checking notes, credit cards, fluorescent inks (invisible inks), cracked glassware, or even crime scene. The body is built of high quality aluminum alloy, and it has a very solid construction. Internal wiring applies the high efficient booster circuit, and can utilize the batteries in the largest extent. Type: UV Flashlight Material: Aluminum Alloy Emitter Type: UV LED Wave Length: 365 - 400nm Bulb Quantity: 9 Battery Configuration: 3 Pcs AAA Batteries (NOT INCLUDED) Input Voltage: 4.5 V Runtime: About 6 - 8 Hours Switch Type: Pushbutton Tailcap E-switch Lens: Coated Glass Lens Dimensions (L x Head Dia. x Body Dia.): 8.7cm x 2.6cm x 2.6cm/3.43"x 1.02" x 1.02" (Approx.) Notes: You will find more amazing products if you visit our store. Due to differences in lighting and screen settings, the color of the project may be slightly different from the picture. Due to different manual measurements,allow for slight size differences. Package Included: 1 x Flashlight Torch