The flashlight is equipped with 2 incredibly powerful LEDs. FLASHLIGHTS MADE FOR THE MILITARY!!! The flashlight has a HUGE power and range of up to 1km. DO NOT DIRECT THE LIGHT SOURCE INTO THE EYES CAN BLIND! HUGE power with such small dimensions is due to the latest XML-T6 diode model of the diode!! and LED COB 9W TURNING ON THE COB DIODE IN THE BLINK OF AN EYE MAKES THE NIGHT!!! The flashlight has an adjustable beam angle. From a wide 20 m diameter to a small square!! light color: snow white is only with T6 LED technology!!! DIMENSIONS: 15cm (after stretching 18,5cm) x 2,5cm fits in standard handlebar mounts so that the flashlight works great as a BICYCLE lamp!! Included: BUILT-IN BATTERY usb charging cable flashlight Remember that the range of 1km is noticeable with clean and dry air, i.e. in spring, summer. How to start the side diode? Turn on the flashlight with the rear switch, and then press the rear switch gently so that it does not "click" then the lighting program changes