see here for product specs and further details. cost: $71 off ebay delivered to my door. there are a couple auctioned every night on ebay so snipe the action and get a bargain like me. :wink: ($130 RRP at dick smith/tandy etc.) installation: took less than five minutes, clamps onto the side of the helmet with allen keys (so it can be removed without leaving a trace) and the flat speaker velcros securely onto the helmet lining. road test: works like a charm, people i've called can't tell i'm on the bike, the only annoyance is that my mobile doesn't have voice dial functionality so i can't take advantage of that feature. [img:350:225:605d34ae33]http://www.cardowireless.com/included/images/scala_rider/sr_onhelmet350x225.jpg[/img:605d34ae33] [img:350:297:605d34ae33]http://www.cardowireless.com/included/images/scala_rider/sr_speaker350x297.jpg[/img:605d34ae33] [img:450:225:605d34ae33]http://www.cardowireless.com/included/images/scala_rider/scala_riderspecs450x225.jpg[/img:605d34ae33] verdict: if you're not worried that being on a call will distract you, get one!