Features1Converting firepower into electrical energy through thermoelectric technology, can recharge USB recharging devices without worrying about going out to use electricity. 2Compact size for convenient carrying and storage. 3Multi functional, capable of heating, cooking, and providing electrical energy. 4Built-in large capacity battery for long working time. 5An nice accessory for outdoor activities.SpecificationThis furnace can convert heat into usable electricity and provides portable cooking and off-grid recharging solutions. The furnace is composed of a 500ml water cup sized metal furnace and a recharging module with a USB interface. You need to combine the two together, then add fuel such as small branches, small wood chips, etc. to the metal furnace and ignite.Features:Converting firepower into electrical energy through thermoelectric technology, can recharge USB recharging devices without worrying about going out to use electricity.Compact size for convenient carrying and storage.Multi functional, capable of heating, cooking, and providing electrical energy.Built-in large capacity battery for long working time.An nice accessory for outdoor activities.Specifications:Color: orange, green (optional)Material: plastics+metalBattery: 3.7V, 5000mAhItem size: 230 * 180 * 120mm / 9.1 * 7.1 * 4.7inItem weight: 1100g / 2.4lbPackage size: 300 * 135 * 320mm / 11.8 * 5.3 * 12.6inPackage weight: 2300g / 5.1lbPacking List:1 * FurnacePackage List1 * Furnace