Boo.........mine are dead....
One of the pair failed last week - water ingress into the switch - caused mild corrosion - despite cleaning up, they failed again a few days later. Dried unit out, no good.
Went back to
Wiggle, promptly dealt with, but no stock, and none expected for a while - money refunded ! Looks like lots of places are out of stock.
Do watch out - make sure the switched section is towards the top, just in-case water get's in.
Felt a bit vulnerable from the side, so on went two spare Smart Superflashes on the rucksack.....think I'll stick with them now, rather then spend another £50-£60 on a set.
Bit disapointed, and certainly feel the switches are pretty rubbish.