SmartCane is a device that sits atop her regular walking stick and uses ultrasonic beams to scan the surroundings,detect objects in the path and generates tactile output in the form of different. The SmartCane is designed to help users detect obstacles above knee-level and prevent accidents from occurring. Using sensors, the device detects obstructions up to a distance of 3 meters. It attaches to the top of a standard folding white cane, currently used by millions of visually impaired people across the globe. The SmartCane mimics the capabilities of bats, using sonar to detect objects in the surrounding environment. Ultrasound waves are sent out and, when they return to the cane, they vibrate on the relevant side of to warn of an obstacle ahead. Different patterns and intensities let the user know how far away an object is. The SmartCane costs only about $50 and is already in the hands of about 10,000 people.