ship from Japan Ergonomically designed keyboard for a comfortable typing position when using the keyboard The keys are arranged in such a way as to reduce the burden on the shoulder. The wrist rest structure is large enough to place the palm of your hand on the keyboard. The scroll wheel makes it easy to scroll through the Internet and documents at the touch of a button. It has a standard 19mm pitch keytop that is easy to type on. It provides a deep, firm and superb pressing comfort that you would not expect from a membrane. Key: 88 keys Key display: Japanese 109A layout Supported OS: Windows10, 8.1, 8, 7