The world's highest recorded surface temperature is 56.7 Â°C (134 Â°F) measured at Greenland Ranch in Death Valley, California, USA on July 10, 1913. The mean temperature in Dallol, Ethiopia is 34.4 Â°C (94 Â°F), the highest annual average temperature on earth.
The Wave System III is made in Columbia South Carolina. The Bose A20 and A20 Bluetooth headsets are made in the United States. The US made Bluetooth Headphones they provide are the the most advanced BoseÂ® aviation headset yet, and they are still US made. The A20Â® Aviation Headset is used primarily in the aviation industry.
Massachusetts Institute of Technology professor of electrical engineering Dr. Amar G. Bose founded Bose Corporation in 1964 after being disappointed with the sound quality of a newly purchased stereo. Four years later, he introduced a speaker system that came close to reproducing the experience of live music.