shell material:Nylon window material:polycarbonate power:solar cell(250mW,2.5V/100mA) power storage:Ni-Mh rechargeable battery light:6 super-bright LED at 2 sides light mode:Flash/constant light color:available with amber,blue,green,red or white view distance:more than 800m working mode:start when night falls or with oneset of inclement weather automatically working time:over 120hrs for constant light mode and 150 for flash when fully charged life time:3-5yrs heat resistance:-40℃~60℃