This has been the 3. livelooping tool in history: 1996. its discontinued, but the manufacturer still offers the original manual and there is a recent model 3

reviews are here

here is how Boomerang 1 can be upgraded to Boomerang 2 

Boomerang is a small specialized company the maker Nelson is a friend of ours 🙂

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60 Second Deluxe

Boomerang 3