What is this PCB For?

I have two PR35-17 PEI2CB boards that I can not find what they are used for. I have searched online and in the store without any luck finding them. Can someone help? I have attached a picture of them.

Hi, we no longer offer that product, however this product is a good alternative:

This is an I2C interface adapter for Particle Photon or Electron devices.

Thanks Travis, it should still work then. I have several of the Screw Terminal Breakout Boards.