Calciphylaxis. Calciphylaxis is a condition characterised by necrosis (cellular death) of the skin and fatty tissue. It is seen mainly in patients with end stage kidney disease. It is also sometimes called calcific uraemic arteriolopathy.
Besides a data link, USB provides 5 +/- 0.25 volts to power an otherwise unpowered device or charge a battery in a self powered device. A USB controller or hub is required to power one unit load (100 mA, a low power load). It can optionally power up to 5 unit loads (500 mA, a high power load).
The smaller new Surface Pro 3 power supply is 36-watts, compared to 48 watts for previous Pro power supplies and 24-watts for Surface RT and Surface 2. USB port. As with previous Pro power supplies, the Surface Pro 3's power brick includes a USB 2.0 port for charging devices like phones or tablets.