Meet Sgnl: a smart watch strap that combines with your regular watch, Apple Watch, Samsung Gear, or Pebble watch to allow you to make calls by touching your ear with your finger. It has an embedded microphone and body conduction unit, which transmits vibrations through the body to be converted to sound.
Simply put your finger to your ear to block background noise while taking calls. No need to carry an extra headset when you have one of these. Sgnl lets you hear in loud places. People around you won’t be able to hear your calls. Sgnl is expected to ship in Feb 2017.