Description <br> Description: <br> Key Mechanical Gaming Keyboard: keys gaming keyboard with 1 piece knob button, the knob button replaces the middle button of mouse, controllable with one . <br> Wired Keyboard: DIY wired keyboard, the knob button is suitable for adding and subtracting volume, zooming and other functional operation. <br> Button Function Customization: to replace complex operation, button function customization, copy and . suitable for games/office//media/industrial control. <br> One Operation: to USB interface, no need driver, and . <br> E- Keyboard: Suitable for , portable and durable. Durable up to 50 million times, can use the operating for Windows/VISTA/Linux/Mac, etc. <br> Specification: <br> Material: acrylic <br> Knob: Metal <br> Size Chart: <br> 102x57x37mm/4.02x2.24x1.46inch <br> Includes: <br> 1 Piece Key Mechanical Keyboard <br> 1 Piece USB Cable <br> Note: <br> 1. Please allow slightly error due to manual measurement. <br> 2. Due to the difference between monitors, the picture may not reflect the actual color of the item. <br> 3. Wish you a wonderful on- shopping! <br>