Tinsin Rocket3-A H4 installation steps video
R-3 H4 Installation Steps：
1.Spin and take out socket form bulb.
2.Install socket on the hole of the car assembly then tighten up it.
3.Drill hole on the original dust cover with the diameter of 29mm.
4.Wear our silica gel dust ring on the original dust cover then put light in.
5.Put bulb in the car assembly and tighten up it.(attention: be careful the chips)
6.Spread red copper belt connect power supply and installation is over.