... , you should show it to your customer let them know what's the different between our products with other's supplier's ... best service. Our products have passed through ISO9002 quality system, the CE, E-MARK, ROHS, Dot and other relevant certification. 3 ... temperature range: -20 ~ +85oC5) Low voltage protection: when voltage of the battery is less than 9V, ballast will stop working to ...