product has multi functions of led steady flashing, strobe, and simulated revolvingoperating options with switches inside product or external connectshock and vibration-resistant, maintenance reduced with long-lasting energyefficientled light bulbbuilt-in buzzer available(volume : max 80db at 1m)flashing type(lf) flashing rates : 60-80 flashesminstrobe type(ls) flashing rates : 70-80 flashesminsimulated revolving type(lr) flashing rates : 120-140 flashesminmaterials : lens-pc, housing-abs, mounting bracket-pcambient operating temperature : -30c to +50cprotection rating : ip65certificates : ce complaintcomplaint with rohs directive.