Has 3 HD/SD tuners. 2 for Dish HD and 1 OTA. You can record 3 shows at one time if you have OTA connected. (All 3 can be HD) Is a Single TV DVR. As External Hard drive support that can add storage to your DVR. A one time 39.99 activation fee is required. (Swapping between 612 and 722/622 is supported on same fee) To get OTA guide info, you must subscribe to your locals (Assuming you have them). What guide data you get various from DMA to DMA and includes both locals and other OTA channels. Does not support PIP. Will however utilize the TVs PIP if available. Does not support Dual Live buffering User operation is similar to 622/722. ALL OUTPUTS ARE HOT at the same time!!! If you feel something should be added to the list. Feel free to PM me the suggestion and I will add it if it makes sense. The purpose of this list is to provide a short quick list of frequently asked about features or behaviors of the 612 receivers. Should be helpful for people that are both wondering what the receivers can do and help people looking for answers.