HRP-TB 1.enhance the ability of the bulbs . power exchange rate is 86%--87% 2.longer 600 hours life than other ballast 3.all parts reache to War industry standard 4.performance super than HELLA 5.protect all the car's parts and electrical circurity. 6.Protection of reverse connection: No damage against ballasts and bulbs will be caused by reverse connection. (In the extent of input) 7.Protection of short circuit: Lock protection against continuous or long-time short circuit. (In the extent of input) 8.Protection of open circuit: Recover when reboot. Lock protection in 0.5s after open circuit. Recover when reboot. (In the extent of input) 9.Special request: Water proof, shocking resistant Current Norm:3.4A Max Input current:5.4-6A Max Input power:42W Working Tem :-40- +125 Size:10.5*7.7*3.2cm