Yes! Most portable keyboards allow users to connect multiple devices via Bluetooth. In fact, you can connect up to three devices at a time, such as your smartphone, a tablet, and your laptop.
The steps for adding a device may vary, but, typically are as follows:
Turn your keyboard on and put it into pairing mode.
Turn Bluetooth on for the device that you want to add to the keyboard and make it searchable.
On your device, select your keyboard from the list of available devices.
If prompted, enter the passcode provided.