A robotic massage chair is a chair that contains internal electronic motors and gears designed to massage the person sitting in them. Most robotic massage chairs have some form of controller to vary the type, location, or intensity of massage. The first electric massage chair was invented in Japan before World War II.
Temperatures at Everest Summit and Base Camp The coldest temperatures of the year occur from the 15th of December onward until the end of January with temperatures at the summit averaging -37C (-35F) while those at Everest Basecamp average -17C (1.4F).
TOTAL: 17 days to 46 days. To reach the summit of Mount Everest can take anywhere between 4 to 8 weeks. You have to allow time for your body to acclimatize to the high altitude by climbing high then descending low, then you must wait for the right weather window to allow you to climb to the summit and back safely.