Security researchers at Bastille tested a variety of wireless keyboards and found several that are vulnerable to keystroke interception and injection techniques.

The researchers developed a specific attack called Keysniffer, and used it to both read user keystrokes and inject their own keystrokes remotely, from as far away as 250 feet. The attack is possible because the affected keyboards don’t encrypt communications with the host computer.

Bastille obviously didn’t test every wireless keyboard out there, but they did provide a list of those they found to be vulnerable.