Uv Lamps Led Flashlight 18650 Ultraviolet Lamp R5 Jade Identification Lights Purpl Yellow White 3 In 1 Light Jewelry Gemstone Inspection Dog Urine And Stains Detector Lights Measurement Scale stainless steel Imported Light:Purple/yellow/white 3 in 1 light color with 3 mode,Size: 13CM x 2.2CM x 1.9CM ,with 18650 rechargeable battery. Yellow light especially for jade identification, and Yellow light is used in traffic lights,car fog lights,night fishing. Purple 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, food stains on floor/table With Length Measurement It good for business , academic research,Antiques Pocket and Portable is convinient,with reachargeable 18650 battery