Now in stock at Airsoft World and you can get to choose among four versions to suit your preferences... "A nice replica of the S&S Manta strobe that has been designed to better fit the curvature of mordern combat helmets. Powered by a single CR123 cell, the unit defaults to Infra Red mode when powered up. Pressing the side buttons together changes that to visible light - in this case blue. The frequency of the strobe can be adjusted. Supplied with a velcro backing to facilitate fixing to similar, and a cord to tie it onto your kit if you prefer."