Instruct: Classify Amazon reviews into positive or negative sentiment
Query: I found out why these don't always work

I purchased two of these, and wasted two days trying to figure out why they worked sometimes and wouldn't work the rest of the time. I finally figured out that the very small switching power supply doesn't work properly with the extender. If you plug the power supply into the extender BEFORE you plug the power into a wall outlet it will NOT work. If you plug the power supply into the wall outlet first, and then into the extender it will work fine. Even though it will work that way, anytime you lose power it will not work again until you disconnect and reconnect the power cord at the extender. I picked up two 12 VDC power supplies at a thrift shop for $2 each, and now I'm back in business. It does work well as a repeater.After spending hours on the phone with people in India, I called Hawking sales, and got them to transfer me to someone in Engineering. Hopefully they'll soon package the extender with a power supply that works.