I found a review of that wrench .
From Toolmonger They have done a very extensive review .
Summary/Conclusion
The AutoWrench is a handy tool. Our tests proved that it can hold up to just about any realistic use around the house or home shop — or for that matter pretty much any shop. One reliability note: if you do manage to over-torque the wrench, it’ll never be the same again. Granted, you’ll probably need to either jump up and down on it or stick a long pipe on it to over-torque it, but we’ve certainly seen stranger things happen.
We only see one drawback to the AutoWrench, and that’s battery cost. If you only use it rarely, its two AAA batteries would last quite some time. But if you’re not using it much, do you really need the automation?
If you commonly use an adjustable wrench while hanging on to something else — or you just love cool gadgets – the AutoWrench will help. It’s not as strong as a standard adjustable wrench, but then again neither are you.
Street pricing starts around $30.
