They own europe coal mine explosion-proof certificate -atex. Main light adopt led, has a high brightness and long life span. The switch of headlamp adopts light-touch electronic switch, good seal and easy to use. With the microprocessor control chip inside, it has multi-function for self-protection, intelligent managing the process of charging and discharging, and can be charged by all kinds of chargers. It has li-ion battery pack, which has no memory, free of maintenance, environment protection, safe and reliable. The product is widely used for lighting in the environment where flammable and explosive gases exist. Kl6ex 1, atex certification. 2, 25 yrs specilized in miners cap lamp. 3, lighting time>16 hours; ip54 protection grade;explosion proof; lithium manganic; service life>2yrs; max illumination>5000lx. 4, 0.65 kg; rated voltage 3.7v 5, we also welcome customized.