Review on Sungwoo Foldable Silicone Keyboard: Waterproof & Wired Rollup Keyboard for PC Notebook Laptop (Black+Grey) by David Cronin

Bought for travel as I often use 10 keys and my laptop doesn't have them. Used it when it first arrived and it seemed to work fine. Thought it would take some time to get used to so he seemed pretty happy at that point. Shortly after that I went on a business trip and tried to use it again but now 3 digits on the 10th button don't work. Put it back in my laptop bag to return but forgot during the return period and was now stuck with a $20 junk.