Amazing fire starting device that causes spontaneous combustion using air. Transparent design reveals the burst of light generated at the instant of ignition. Similar to the Diesel engine, heat generated by compressed air molecules is used to ignite tinder. Can be used to ignite numerous natural tinders plus charred cotton cloth. Features a machined aluminum shaft, the patent pending, 2nd Generation pressure relief valve. Comes with complete instructions, Char-cloth and a spare O ring.