87 Keys Mechanical Keyboard for Mac & Win. K870T houses 87 keys and make use of each space. You have full arrow keys, and other basic keys for sure. Its designed for both Mac and Wins system, simply press button to switch between the system. This size saves lots of desktop space, giving your right hand and mouse more space, whether you are working, gaming or daily use, it will perform perfectly. Small in the appearance but big inside Bluetooth Wireless/Wired Mode, Connect Up to 3 Devices. Designed with Bluetooth mode and wired dual mode, you have more choices. Bluetooth3.0 is stable and strong enough to ensure 10 meters transmission distance. It can connect up to 3 devices at the same time, simply press FN+Q/W/E to exchange between devices, easy to use and suitable for both work and game. Moreover, the wired mode will also charge the keyboard at the same time, a cool function and time-saver indeed N-Key Rollover and Built-in 2000mAh Battery. This model is programmed to be N-key rollo