The Institute of Geophysics of Ecuador uses FreeWave technology at Tungurahua, the highest volcano in the world which operates at below zero temperatures from a height of 5,947meters (19,511 feet) above sea level. FreeWave M2M devices capture early-warning signs that an eruption is imminent and transmit images from the top of the volcano. With hundreds of thousands of residents living around the volcano, early warning is crucial to take precautionary measures and evacuate citizens before an eruption can take place. The Geophysical Institute of Peru also uses FreeWave technology to capture and transmit sensor data across a line-of-sight path of up to 127 kilometers (78 miles) at 115 Kbps or up to 67 kilometers (41 miles) at 1 Mbps.