I just got it today. It is about the size of a d battery. Bigger then I expected. Man is it bright. I bet it rivals my xenon flasher. Even with the lights on looking at it is hard on the eyes from arms length. Really easy to change the batteries just twist one end and there you go. You have two rows of lights and one button for each. You get blinking steady and running two speeds on each one. So you can get away with just one set running at a time.
I think this is a better choice overall then the xenon. Far longer run times and cheaper in the long run.
I bought mine off of eBay as it is not available yet for the most part in the us. Here si the fellow http://search.ebay.com/TL-LD1000_Lig...ertyZ1QQsotrZ2
Or just do a search for TL-LD1000
The box claims 100 hours. I think that would be with one set of lights running. But it is so bright one is about all you need.