Maximum Lengths. According to USB.org, USB operating specifications limit the maximum length of the cable to 5 meters for full speed devices and 3 meters for any low speed devices. 5 meters is around 16 feet 5 inches, and 3 meters is around 9 feet 10 inches.
A National Kidney Foundation answered. Kidney damage from lupus can be mild or severe. It can cause damage to the filtering units (glomeruli) of the kidney. Since these filtering units clear your blood of waste, damage to them can cause your kidneys to work poorly or not at all.
SLE can also affect other parts of the skin elsewhere on the body. Aside from the visible effects of systemic lupus, the disease may also inflame and/or damage the connective tissue in the joints, muscles, and skin, along with the membranes surrounding or within the lungs, heart, kidneys, and brain. SLE can also cause kidney disease. Brain involvement is rare, but for some, lupus can cause confusion, depression, seizures, and strokes. Blood vessels may come under attack with systemic lupus. This can cause sores to develop on the skin, especially the fingers. Some lupus patients get Raynaud's syndrome, which makes the small blood vessels in the skin contract, preventing blood from getting to the hands and feet -- especially in response to cold.