BLUETOOTH AND USB CABLE DUAL-CONNECTION MODE RK71 mechanical keyboard can connect up to Fives devices simultaneously and can switch among them easily. This keyboard is compatible with most operating systems, including Windows XP/Vista/7/8/10, iOS, macOS, Linux, and Android. Also, comes with a detachable USB cable, you can easily charge the keyboard while shifting to the wired mode. 71 KEYS RED SWITCH Ambidextrous Shape with Maneuverable Simplicity: Compact minimalistic layout with 71 keys makes you a neat desktop, even folks have nothing to do with Minimalist will dive into its tiny practical design. Tips you might want to know is that keyboard without numpad is most FPS gamers’ choice, more spaces left for mouse movements. ERGONOMIC DESIGN RK71 Mechanical Keyboard is your good choice in office or home even if in-game. Not only it is over-engineered and built to take a beating, but it also has great ergonomics and a space-saving design delivering a pure, fluid gaming experience. No matter how long you type or how intense your gaming marathons are, you are always comfortable. RGB BACKLIGHT Want a stylish wireless keyboard? RK71 will be your best choice. 9 sets Sidelight effect cycle switching, support off. BUILT-IN RECHARGEABLE BATTERY The RK71 keyboard is built with a rechargeable1000mA lithium battery. Adopts the advanced energy-saving chip, this keyboard will enter sleeping mode 1 minute without operation and backlights off.