Placing the antenna higher or close to/in a window may result in better reception. You must rescan whenever you move the antenna.If you use a flat HDTV,please go through your TV manual to make sure your TV comes with built-in tuner.Make sure you are using an HD receiver; otherwise no HD channels can be picked up. please read receiver manual.You need to retune your TVs and digital receiver from time to ensure you are receiving all available services.retuning takes only a few minutes and can be done with your remote control.TV reception capacity depends on the distance among your home,transmitting tower and surrounding environments.
1 year warranty