Speak to your friends and colleagues like a secret agent with the Sgnl Smart Audio Watch Strap. This device replaces the strap on your normal watch, so that you can hear sound through your fingertip. The strap uses body conduction technology to send the sound up your arm, while using very little power. As a result, you can chat for hours on end without holding your phone or wearing a headset. Your calls are totally private, and it can be adapted for use with virtually any watch (incl. Apple Watch). Furthermore, the strap can act as a standalone wristband if you don’t normally wear a watch. In addition, Sgnl can alert you to notifications and act as an activity monitor throughout the day.