A keyboard with a compact and slim arc line with wire / wireless one platform. An eco-friendly product with injection molds only. It offers a modeling that is not fed up, using basic modeling only. It is designed to switch between wire and wireless, using a USB2USB cable to resolve the battery-discharging problem. The keyboard can be set on edge to save desk space (patent pending in many countries). Using the arc modeling with ergonomic design, which minimizes finger movement, consumers can use the keyboard comfortably. This keyboard is the world’s first wire / wireless USB2USB connection type one platform.