This heater is gas powered, very convenient to use. It is lightweight and portable for your outdoor trips. Type A Features: Made of stainless steel for durability. Piezo ignition system to start heating easily. Mounts to a gas stove and requires no electricity. Rust proof emitter guard. Adjustable safety valve controls gas flow and heating power. Weighs 10.8oz and comes in a storage bag, convenient to carry. Type B Features: Made of stainless steel, rust proof and very practical. Two-layer construction for increasing the temperature and warmth. Four buckles on the bottom for fixing the heater on your stove, very easy to install. With a handle for moving the heater conveniently, protect your hand from the heat. Type A  Specifications: Material: Stainless steel & Aluminum alloy & Copper Gas Type: Butane Supply Pressure (bar): Direct pressure Injector Diameter (mm): 0.22 Normal Heat Input (KW)(Hs): 1 Fuel Consumption(g/h): 72 Designation of Gas Container: 227/230 grams 509ml 450 grams 990ml 230 grams 509ml 300/300 grams 806ml 450 grams 990ml Dimension: 15 * 14cm / 5.9 * 5.5in (D * H) Weight: 306g / 10.8oz Type B Specifications: Material: Stainless steel + Iron Dimension: 115 * 145mm / 4.5 * 5.7in (D * H) Weight: 340g / 12ounce Type A  Package List: 1 * Heater 1 * Canister Stand 1 * Storage Bag Type B Package List: 1 * Heater