This is a foldable, portable Bluetooth mini keyboard. It has been confirmed to work with iPhones and functions without issue. While I haven't performed real-world testing on other devices, it should theoretically work with any device equipped with Bluetooth. It folds up compactly, making it convenient to carry. It's suitable for use on the go, during business trips, or while working in a cafe. Overall, it shows little sign of use and is in very good condition. Being wireless and requiring no cables, it allows for comfortable text input on smartphones and tablets.