... methane.Introduction1,The product with light source of high-power LED is supplied power by Lithii battery;its main features include safe and ... ,anti-corrosion,maintance free,use- cost low ;2,The product is portable; there are two groups of LED light source in ... can be fixed in the mining safe cap.3, KL4LM is suitable to the environment temperature -15~40 centigrade;Conform to ...