Features: 1211 halogenated alkane, that is, dichloro-methyl bromide, the chemical formula for the CF2ClBr, usually the temperature and pressure, it is colorless gas, the boiling point of -4 ° C. 1211 extinguishing agent with no traces of fire, Corrosion, and the wide adaptability of the characteristics of A, B, C class of fire and live objects can be effectively extinguished fires, especially for precious precision instruments, books and data specimens more advantages, known as the king of fire extinguishers. In addition, in a small space does not affect the use of visibility and breathing, such as aircraft cabin.