Full -size Portable Design Foldable，Portable，Never Settle 100,1000 Times Folding Action,5 Years Aluminum Hinges Scissor-Switches Quiet Typing Quiet and Ultra-precise Typing Experience Rechargeable Bluetooth Keyboard 150 days Standby 2 Hours Full charged Stable hign The non-slip pads at the bottom keeps the keyboard balanced and stable, it won//x27;t move when typing Sync up to 3 Devices Full-size Foldable Keyboard Offers Maximum Efficiency /Folding Full-size Wireless Keyboard/ ProtoArc XK01 portable bluetooth keyboard designed with 105-key layout with number keypad (Dimensions: 15.19 x 4.68 inch ). You can adapt to its layout and enter into working state anywhere. /Sync up to 3 Devices/Our small bluetooth keyboard allows you to pair up to 3 devices on triple bluetooth channels simultaneously. Easy switch at a press of button. Compatible with Windows, Mac OS, iOS or Android device, you can work with your ipad, phone, tablet or laptop seamlessly /Scissor-Switches Quiet Typing/The quiet and responsive scissor switches low-profile keys offer fluid, laptop-like efficiently typing. A great wireless foldable keyboard that remove over 90/ of disruptive sounds and keep the familiar typing feel /Sturdy and Durability/Framed with aluminum body for excellent stiffness, the keyboard smart hinges has a long-term usage. It is very durable and has the ability to resist bumps. You can easily fold up with magnetic and it won’t open easily when you put it in the bag and carry around How to Connect and Switch Between 3 Device 1. Unfold the keyboard (Unfold to power on, fold it to power off ); 2. Single press to choose BT1, the blue indicator light will flash once to enter bluetooth mode; 3. Then long press BT1 for 3-5 seconds, blue indicator flashes quickly, keyboard enters into pairing mode; 4. Go to your device Bluetooth list and find “ProtoArc XK01”, click /quot;pair/quot;, keyboard is connected; 5. BT2 and BT3 connection are the same as BT 1, when successfully pair 2 or 3 devices, short press BT1/BT2/BT3 button to switch.