Xena XZZ6 Disc Alarm Lock: A Review

I believe the rattle is part of the movement sensor (mine is the same - probably a ball bearing to recognise when it's moved?).

If you having trouble arming it try putting some metal over the sensor manually - I was wondering how to set mine until I put a fork handle over the sensor and it armed itself!

I just received a Xena XZZ6 in the post, and I can't get it to arm/alarm. I wonder if it's broken. When I shake it it sounds like a bunch of loose debris is rattling around inside the alarm/battery pack. I think I'll have to return it. I'm very disappointed. I had pronounced it to friends and family as the future of any further bike security... and it's a dud...