1.⌨[FULL SIZE FOLDING WIRELESS KEYBOARD & MOUSE TOUCHPAD] : You can have full control to be compatible with Samsung S21 FE with our Built-In Rechargeable Battery that provides 48 hours of use (560 days standby) along with a mouse touchpad and left and right click buttons. It a very convenient and portable mini size for user-friendly interaction. (PHONE HOLDER/STAND NOT INCLUDED) 2.⌨[FOLDABLE TRI-FOLD DESIGN] : Our FULL SIZE Travel Keyboard is extremely thin and foldable, making it a perfect gift for those who often travel or are on a business trip. It enables you to operate your mobile devices while on the move. Write fast, easily, and error-! It's also a good choice for editors 3.⌨[ALL ANDROID PC MAC IOS CONNECTION MODES]: You can connect the keyboard with your device via Wireless Bluetooth to ANY Android, IOS, Mac, or Windows Device. The long-lasting 560 days of standby time and up to 48h of continuous use make this a versatile device for all your needs. 4.⌨[WIDE & UNIVERSAL COMPATIBILITY]: With Bluetooth 5.3 technology, the foldable keyboard can work with 3 major operating systems: iOS / Windows/ Android. NOTE: [For Desktop PC Laptop without bluetooth function, you need to use third-party bluetooth adapter (not included) before use]. Folding size: 5.98' x3.82' x0.71'