The BioLite FirePit produces a big fire with very little smoke that will burn evenly and continuously with the use of a Bluetooth-enabled controller. You can burn both wood and charcoal in this portable fire pit that doubles as a grill. There are 51 airjets that are designed to feed the flame with oxygen to create a uniform temperature. To recharge, you just have to simply remove from the FirePits and charge it via USB.