Here is a smart hat with bone conduction audio that lets you listen to your music, take calls, and have your ears open. ZEROi connects to your devices via Bluetooth. It is water resistant and has a one touch button for control. It comes with 4 bone conduction speakers.
ZEROi keeps your ears open, so you will be aware of your surroundings at all times. It has a built-in microphone to take calls. The battery life lasts up to 5 hours.[where to get it]