I ordered a "Big Letter Keyboard For Visually Impaired (Black)" along with standard delivery. Delivery was extremely prompt; it arrived after just a few days that included Sat & Sun and it was in perfect condition. I have been using it for only a short time but it is ideal for me - I am partially sighted due to Macular Degeneration. The high contrast white on black keys are just the job. Although I retired many years ago, my present volunteering roles require much use of MS Office applications and so of particular importance to me is the fact that it is a full-size keyboard. The TechSilver website was very easy to use, especially the checkout procedures. I say this because I use a personalised high contrast theme in Windows 10 and I am surprised how difficult it is for me to use some websites, even major ones!