- FULL-SIZE FOLDING WIRELESS KEYBOARD & MOUSE TOUCHPAD: Experience seamless compatibility with the HMD XR21. The built-in rechargeable battery provides up to 48 hours of continuous use and an impressive 560 days of standby time. The integrated mouse touchpad includes left and right click buttons, offering a convenient and portable solution for user-friendly interaction. (Note: Phone holder/stand not included). - FOLDABLE TRI-FOLD DESIGN: This ultra-thin, full-size travel keyboard is designed for those on the go. Its foldable design makes it an ideal gift for travelers and business professionals. Effortlessly operate your mobile devices, allowing you to write quickly, easily, and accurately. - UNIVERSAL CONNECTION MODES: Connect the keyboard wirelessly via Bluetooth to any Android, iOS, Mac, or Windows device. With a long-lasting standby time of 560 days and up to 48 hours of continuous use, it is a versatile solution for all your typing needs. - BROAD COMPATIBILITY: Utilizing Bluetooth 5.3 technology, this folding keyboard is compatible with the three major operating systems: iOS, Windows, and Android. For desktop PCs or laptops without Bluetooth capability, a third-party Bluetooth adapter (not included) is required. The compact folding size measures 5.98" x 3.82" x 0.71". Use Cases: 1. Perfect for business travelers who need to work efficiently on flights or during layovers. 2. Great for remote workers who require a portable solution for typing on various devices. 3. Ideal for content creators and editors who need a reliable keyboard while on the move.