Description:M2 UV flashlight is also called black light, adopts high efficiency pure 365nm UV-A LED with the LED radiation flux of 2060nW. The flashlight body is compact with a steel clip included as an accessory, powered by 1 piece of li-ion battery, compact and portable.Specifications:Case Material: Aerospace Aluminum Alloy construction; Black anodized finishReflector: Optical glass lens, even-beam, fits for close-up usageEmitter: High efficiency UV-A LED, peak wavelength of 365nm, continuous lifetime of about 1000 hoursOutput:Tested with Weltool UB18-35 Rechargeable Lithium BatteryLow radiant flux modeHigh radiant flux modeLED Radiant flux:680mW2060mWSpectral radiosity 38cm(15in):350W/m21100W/m2Irradiated area (round) diameter of distance of 38cm(15in):36cmCentral beam (round) diameter of distance of 38cm(15in):36cmVisible spectrum illuminance @ distance of 38cm(15in): 6Lux 19LuxRuntime(h): Until radiosity falls to 10%:10h 25min4h 20minBattery: 1 x 18650 rechargeable lithium battery (not included)Switch : Tail cap switch (up to 50,000 presses)No need preheat, press to switch on, reduce the preheat time.2 adjustable modes, suitable for different usages.Reverse Polarity ProtectionOver-Discharge ProtectionLow Voltage WarningFully regulated output, no PWM, no circuit noiseHigh light transmission tempered glass lensPurple oxidized aluminum alloy protection bezelAnti-slip, anti-roll design1 meter impact resistanceO-ring sealed, IP67 water resistance ratingIndividually serializ