Shelf edge label price, down from 7.50.
These are so bright you'll be seeing them for five minutes when you first turn it on. Front is 90 lumens, rear is 26.
No idea on durability yet as I just got them but they seem better than usual quality, as in not hollow. You can use the easy release rubber strap to wrap it round whatever bar or remove that and clip it on saddle bag /clothing etc.
Try it before you buy it though, as some have different flashing modes to cycle through and others don't flash but cycle through brightness. (after looking at instructions I saw that you hold the button in to change between solid and flashing, so this doesn't matter)
Hold the button in to power it off again so as not to blind any other customers lol