No, it's not the name of a new game or even an accessory for a Square Enix game, but it does veer close to the topic of seemingly hi-tech devices. As a device, Aria is actually quite simple, either a Bluetooth clip or a watch strap. But in action, it gets pretty complicated. Almost like magic, it allows you to control your smartwatch just using finger gestures, freeing your other hand's fingers for other tasks. And since smartwatches these days connect to and control almost anything and everything, your fingers can control those as well.