The hardware also vibrates, enabling you to set it at specific intervals, either for enhanced pleasure or so you can put the metronome back downstairs in the music room. There are even five LEDs that sit on top of the device that'll light up when you hit a steady rhythm. Assuming, that is, that you'd prefer to use that rather than some of the more obvious clues that might be available during intercourse -- although we'd find the idea of a strange glow emanating from someone's genitals more unsettling than erotic. It's worth mentioning that the project isn't even at prototype stage yet, and there's always a risk the company might pull out before completion, but at least it's livened up a slow news day.