I had ordered me this lamp in China directly. I was so excited that I wanted to buy them, and lo and behold: With some searching it is even cheaper on Amazon. ;-) It's amazing wertig, entirely of aluminum, focusable and three functions: light - not quite as bright - Blinky Mode. Accessible are the modes through repeatedly pressing the button. I have it installed along with a bike mount for under 2 (also on Amazon) for my son at the MTB. Significantly cheaper to buy as well as in maintenance (regular battery required) as the previous battery-powered lamp, but it is not roadworthiness approval. I was on the site the reliable operation and the lights for my son important as the legal version, which was regularly empty despite three AA batteries (!!) and because of the massive weight is ultimately canceled.