This is a Genuine Genie replacement belt and chain drive model circuit board. It comes with DIY detailed instructions to get your garage door opener back up and running quickly. 

• Compatible with models 2033, 3053, 3120H, 3120H-B, 3155, 3155L, 3155LD, 7035L, 7135, 7155, 7155D, 7155L (only a compatible replacement for units that originally utilized green boards)
• Genuine Genie replacement part 
• Requires re-programming with the new board