There are a lot of devices that can track our whereabouts - but there's one that can call for help if you get in trouble.

The Moxee Signal is a personal security device that's connected to the T-Mobile LTE cellular network.

If you push the button once, it texts or emails a green alert to a pre-set group of friends with your GPS location on a map. If you click the button twice, that's a yellow alert - the signal contacts friends with your location and starts streaming audio from the device. Press it three times if you're really in trouble and everyone gets a red alert - plus the Moxee 24/7 emergency monitoring service is contacted as well.