Double clicking switch button, lighting will be strobe, return last statues by double click switch again
Voltage: 3-8.4V

Model:  UltraFire UF-T50Features Magnetic TailLED: Cree XM-L T6Lumen:  800Color BIN:  WhiteTotal Emitters:  1Voltage: 3-8.4VBattery Configurations:  1 x 18650/2*16340 rechargeable batteries (not included)Switch Type:  Clicky/ClickieSwitch Location:  Sideway  Mode Arrangement:  Press switch for 3 seconds, brightness will turn gradually from stronger to weaker, and then repeat; Double click switch to adjust to Strobe and double click it again to return to the last status.Lens:  Coated Glass LensReflector:  Aluminum Smooth/SMO Reflector