Instruction: Extract information from the supporting document to answer the given question.

Input:
Question: Can the temperature be gradually increased like the volume on a radio or is it either high or low heat? TY
Document: The roaster is great, and it's nice to have a no-flare grill with it.About smoking: the "low" temperature setting is still too high to slowly smoke meat for hours. A rack of ribs will be done in under an hour, which is not ideal. That is enough time to get a smoke flavor and a thin smoke ring, but it's not the same as using an actual smoker.I am not sure you could smoke a brisket with the temperature as high as it is.
Also look for the Tommy Ring modification, as some people note the bottom of the rack is not as hot at the bottom as the top.Trying to perfect my BBQ technique, I purchased a Maverick ET-732 remote temperature probe. There are two temperature settings (Low and High). When I tested the Low temperature (with no food), the thermometer read more than 400 degrees at the top!
This is a phenomenal product. A wonderful, compact and practical design concept. Combining grill / roast / smoker, it does not compromise either but excels in all three functions. The infrared heat is controllable from very low for slow-smoked pork to medium for roasted poultry to intense for a quick seared steak. Fantastic culinary results with any recipe. The parts which come in contact with food and/or drippings are removable for ease of cleaning.
Please note that while it is Big and Easy-to-use, this is not a smoker. It cannot cook like a low temperature Frankly, when I have company, I need to know how long something will take to cook. The Char-Broil SMG (Smoker Roaster Grill) will require experimenting if you need to know the exact times beforehand. Check the Char-Broil forums for tips and cooking times.
you can dry rub, marinade, brine, inject, beer can it. clean up is a snap. after pulling your finished product for consumption just kick it on high and it bakes all the crude into a pan in the bottom that you slide out and if you lined the pan with either an prefabed pan or lined with tinfoil you are done.
I bought this grill for my husband for Christmas 2009. It has been the best grill we've owned! We grill a lot of steaks, chicken, shrimp and crab -- the results are consistent and continue to impress us. Our filet mignon is better than any restaraunt, the chicken is moist and flavorful,and the seafood is always perfect because the temperature is so easy to control. My husband's favorite aspects of the infrared cooking method are no flare-ups and even heat distribution.
I used my grill to cook part of our 4th of July dinner - rack of pork spareribs and corn on the cob. Both came out so delicious!! I used apple wood chips (soak for 30 minutes beforehand); heated the grill on high for about 20-30 minutes, then turned it to low. I used just a slight amount of rub on each side of the ribs, then cut the rack half and hung them inside the basket using the grill hooks, lid closed.
Turn grill on high and run until there is no longer and smoke coming from unit. It's going to STINK while doing this.A great accessory to this item is a ThermoWorks Cooking Thermometer/Timer model #TW362B. Works great and has been reliable.Like that it can do larger items. Have one of the originals and absolutely love it! Hope to be as impressed with this one. Will update as soon as something is actually prepared using it.
The big easy performs prety much as advertised. It grills w/o flareup, roasts like an infrared oven, keeping meat and poultry fairly moist, and smoke cooks. It doesn't really deep smoke since the lowest temp is too high for lengthy smoking times. The problem I have is with the smoker box. It's a down right stupid design. After filling with chips or pellets you insert the box into a receptacle in the side of the smoker.
Really this grill is only big enough for 2 or 3 person cook out, but it has plenty of room in the chamber when basket cooking larger meals like chicken. It's not like this grill has a bunch of high quality parts but you should not expect much for $170. None the less everything works great and the ignitor fires up first try almost every time. I also purchased all the accessories for this grill which is great char broil offers so many accessories.
Answer: It has a gas control that  can gradually regulate the temperature from 325-450 degrees. I bought mine for thanksgiving and now use it for just about  anything, it is a true "Jack of All Trades" smoker; I love it!