Has anyone used expansion module? I have tried this product recently, everything works fine except the screen. I think the screen is too dark to see the speed dial on it. I have tried both 7914 and 7915, but got same result. How can tune it more easy to see? Thank you!
You can use the Contrast setting in the phone's settings button. The 7914 and 7915 are monochrome without backlighting so be sure you are not expecting something it does not provide.