You don't get what you pay for
I had purchased this item and it was a wreck within weeks. No, I did not abuse it, it is just a piece of junk. The heads began to rattle and make loud vibrating noise within a week of limited use. The cord then became finicky as to the electrical power getting to the unit and you would have to play with the area where the cord meets the handle to get it to work. The extension does work but that is pretty much the only thing going for this particular model. It is now taking up space in a landfill having been replaced by a "Thumper". I highly recommend the "Thumper" and warn anyone who is thinking of buying this product to not walk but run away from it as fast as you can.
Rating: 1 stars