Main Characteristics： 1.It adopts reciprocating type gas circuit, can generate large amount of oxygen with low breathing temperature. 2.The initial oxygen generating device adopts chlorate oxygen candle, can generate oxygen quickly, safely and reliably.. 3.It adopts sheet oxygen generating agent KO2, can generate uniform and sufficient oxygen, have stable performance and low breathing resistance. 4.It adopts temperature resistant glass fiber felt and fully enclosed dust-proof construction has good effect for dust resistant, comfortable to wear. 5.Products have obtained International certificate with European standard No. of EN13794:2002.