Yes mate, I've used one for my PWC which I take offshore often (clipped to my vest) and I transfer it to my tinnie when I go across the bay to Moreton.
I've only had it for a couple months, but THANKFULLY, not had to use it! lol
Mine is a "Fast Find". It's bright yellow, floats, has an optional belt/vest clip, has a std lanyard, and is about the size of a mobile phone but twice as thick. You'll be pinpointed to within 70 metres via GPS.
A blurb from an email re it's specs....
Subscription free and no call charges
406 MHz international messaging
5 year replaceable battery
Simple 3-stage activation
Meets AS/NZ 4280.2:2003 standardsSOS Morse LED flash lightMin 24 hours continuous operation50 Channel integral GPS