Working across 3 devices and doing math on the fly? This keyboard gets you. Compact, with a number pad and three Bluetooth channels — it’s the Swiss Army knife of keyboards. Folds down to the size of a small book, doesn’t rattle in your bag, and holds a charge for up to 40 hours. Typing on it is quiet, smooth, and satisfying. For the office, business trips, cafes — it’s always ready to go.