I purchased this keyboard about three years ago, but I haven't had much opportunity to use it, so I'm putting it up for sale. I've included the results of the keyboard test. The keys circled in yellow showed no response in the test, but they function normally when typing. The keys circled in red are not keys on this keyboard. Overall, I believe it's in good working order, but there might be compatibility issues, so please understand this before purchasing. I've lost the box, so I will pack it with bubble wrap for shipping. Product Information - Brand: Logicool - Layout: Japanese - Connection: Wired - Model: K835TKL - Color: Black - Key Type: Mechanical (Red Switches)