Each TV Market is different in the amount of channels it offers to those using an antenna. The average antenna user can receive an estimate of 48 HD channels. Over the air channels typically range from channels 2-100 within the guide on your DVR+ CM-7500. However, this depends upon where you are located. In order to get an idea of what channels you can receive at your location, please click on the following link and scroll down to where it says "Check Your Location". This will help you understand what channels you may be able to receive over the air.