The review refers to the A1 Eos, which I use as a key ring / Wegeleuchte for over a year. It is robust and easy to use process. She has three lighting modes which are successively adjusted by rotating the front lamp part. The first stage is enough to read and to find a keyhole. The second stage is sufficient to illuminate the way and the third stage is lit even distant objects. The lamp can not focus, however, is perfectly matched so that I do not miss this feature. I appreciate the headlight range to almost 100 meters. As a direct comparison I also use the Led Lenser P7 and the PEL 5 of Ledwave. The P7 can not nominal value deposed in luminosity and beam range of the EOS, however, so they now gathering dust in a drawer. Who can describe the luminosity as funzelig had caught a defective bulb or has seen only the first stage. The CR123A batteries, there are so cheap at Amazon, that the costs remain manageable. The small size of the lamp reaping also repeatedly astonished looks in the face of high performance. I am absolutely satisfied with the lamp, even if the technology progresses and now even more cable is possible with this size. In this respect it is worth exploring the Olight S10 Baton which Eagletac D25C Clicky and the Led Lenser F1. The show what can be done at a reasonable price. I have purchased this lamp as iTP A1 EOS for almost 20 euros a piece. Meanwhile, she's become more expensive, unfortunately.