You want play Snowden, or spy on a russian, or spy on a japonese high tek company, you plug this into the electrical current, over the next wall, or on the down floor. KeySweeper is a stealthy Arduino-based device, camouflaged as a functioning USB wall charger, that wirelessly and passively sniffs, decrypts, logs and reports back (over GSM) all keystrokes from any Microsoft wireless keyboard in the vicinity.