Samsung HD Wi-Fi IP Camera 2 Pack

We had two of these cameras previously purchased previously from Costco, and liked them, so we decided two more. I was able to use the existing wiring from a previously installed, now defunct alarm system to power these camera's which saved some unsightly wiring. I bought 2 more from Costco, and discovered that they had changed the design from a two wire connection to a USB Cable, and was not able to use the existing wires with that setup. I was relieved to find that Amazon had some refurbished cameras that used the old two wire system. I found that these were every bit as good as the original "new" cameras and now have 4 cameras in place that allow me to monitor my home from my iPhone, and more importantly, allow me to check to see whether an alarm reported by a recently installed new security system was real or false. The new/old cameras have been in use for 6 months/2 years and I have had no problems with them.