Which Tracker?

[Mr Gazza]

As yet another sickening thread appears in these pages, reporting the theft of a much cherished Ducati, My thoughts turn once again to the idea of fitting a tracker to my bike.

I know nothing about these devices and a quick search reveals a baffling choice and language that I don't understand.
The prices are encouraging, ranging from as little as about ten quid to just over a hundred and upwards... Seems really stupid not to have one at that price.

Some have a feature of being able to listen to sounds near the tracker (Secret hide out.. Blah blah.. let's strip it... Blah blah.. Yikes here come the Rozzers .. Bang! Argh.).
Sounds like a fun idea.

Some need to be charged, others need to connect to the bike battery.
I would like one that charges from the bike battery and so remains active if the battery is disconnected.

I am eager to learn more, can anyone recommend or condemn any of these tracker thingies?

More of us need to be fitting them.