Many people who are new to outdoor flashlights always feel that the operation of a multi-gear flashlight is too cumbersome. In fact, it is not, outdoor flashlight with multiple gears is very necessary, at least with strong light, low light, flash function. Single-file flashlight is not flexible enough, with a medium or low light flashlight, you can switch in time, one to help heat dissipation, the second is also conducive to extending the lighting time of the flashlight. It is best to have a flashlight with a low brightness gear that can reach more than a few dozen hours, in case extreme conditions can be continuous nightly lighting for more than a week. With the advent of multi-speed dimming technology, the fish and the paw of brightness and range appear on the same flashlight. You can choose the most appropriate brightness for different purposes such as camping, hiking, searching, etc., while saving precious power in a reasonable way. At the same time, multi-speed dimming technology has also derived a number of auxiliary functions, such as sos distress signal, when in danger, you can send out a distress Morse code to search and rescue people for help.