Led Uv Flashlight R5 Jade Jewelry Gemstone Identification Lights Ultraviolet /Yellow/White 3 In 1 Light Stains Detector Lights Measurement Scale With Battery Material: stainless steel Lights Source: CREE XPG-R5 Brightness: 400 lumens Effective range: 100 -200meters Lighting modes: white , yellow , purple Mode:2-4 mode Size: 13CM x 2.2CM x 1.9CM Battery: 1x battery,1500mah 3.7V Switch: tail button switch (light press for dimming, heavy press for off) Weight: 150 grams (without batteries) With Length Measurement 365nm Lights, is not for illumination but for :Ultraviolet light: for identification current,spot scorpions, authenticate currency,driver license,official identification cards,passports,Clear show dried unine&stains of dogs on carpet/rugs/clothes,