Go Hack Yourself - Install Sonar From: Popular Science - 09/2015 - page 81 Want to sense distance like a dolphin? Bottlenose - from the hacker collective Grindhouse Wetware - creates sonar perception in an off-the-shelf kit ($60). Its dolphin-like range finder locates an object in a dark room using an ultrasonic distance sensor. It then sends electromagnetic pulses to a magnet in the user's finger, providing a sense of things like an object's size and distance. As a user moves closer to the object, the sensations grow stronger. Bottlenose can also detect radiation or the presence of ethanol, and it can pick up Bluetooth signals. A thermal infrared sensor spots warm objects - such as a stove or a clothes dryer - from up to several feet away. There are also add-on sensors for detecting things like ultraviolet light and for sensing compass headings. For people without magnet implants, a wearable magnet works just as well, delivering the same sensory vibrations outside the skin, as long as the magnet is worn within the range of the Bottlenose device. Links: Grindhouse Wetware http://www.grindhousewetware.com https://en.wikipedia.org/wiki/Grindhouse_Wetware Bottlenose http://forum.biohack.me/discussion/267/bottlenose-release.-enjoy/p1