Patented ThermoTemp innovation lets you set the temperature and walk away. We've got you covered. The MPS 340G makes propane smoking simple and safe. Master the art of smoking with Masterbuilt. Search by model number to find the manual you need. Patent-pending ThermoTemp innovation lets you set the temperature and walk away. - YouTube No more monitoring or adjusting temperature. The safety shut-off valve provides a safe smoking experience while the 4 smoking racks provide plenty of room to smoke your favorite foods. No more monitoring or adjusting temperature. Masterbuilt ThermoTemp Propane Smoker user review. Genuine Masterbuilt® parts for you Masterbuilt® smoker, grill or fryer. Master the art of smoking with Master built. With a full line of propane, electric and charcoal smokers, you can expect a worthwhile BBQ experience with a Masterbuilt smoker. The 40 inch Thermotemp XL smoker makes propane smoking simple and safe. Need the manual for your Masterbuilt product? The safety shut-off valve provides a safe smoking experience while the four smoking racks provide plenty of room to smoke up to 16 chickens, 6 turkeys, 8 racks of ribs, or 8 pork butts. Masterbuilt® smokers deliver for those ready to master the art of smoking.