I loved the idea of this, so spent the money to get ET+.
Received it in the post and set it up.
I had a faulty unit. Not only did it continually electrocute me whenever I touched it, magnet close
to the switch or not, It also made such a loud buzzing noise you'd have to be in a football stadium
full of fans or a street carnival to get away with it not being heard. I sent it back (which I had
to pay for), and when it was returned 'repaired', it no longer constantly electrocuted me, but the
noise was still horrendously loud. Gave up with it and threw it away. Worst purchase I've ever made.
You might get lucky and receive a working one, but if you don't, don't expect any kind of real
after-sales service.