The lamp is "truly" high speed, this description is true, robust (aluminum housing) has functions that also work and who wants to have a burn-time longer can umchalten to reduced light levels, which is quite easy and convenient. This flashlight is not as hard and long, white other copies - because it is supplied with 2 batteries (and not 3 or 4). Dshalb alone it is their money already Wert.Nur in case of hopefully never occurs, I wanted the SOS Morse code have a function here, which she has. Who was really in just such a similar situation once - estimates the gem flash automtische. SOS morse code. The various functions are described with a rotary switch conveniently and easily adjustable. Unintended switching is hardly possible, because the on-off switch is placed at the back to the inside. Fell down it is already and will continue to function. With all the functions I use them at home just like then when it gets warmer for sailing. Overall, a good offer.