 This is a Bloomberg Money Minute. Samsung is launching its push to fully rival Apple in the wearable devices business. At an event in Paris, Samsung says its long-anticipated Galaxy Ring will monitor the wearer's fitness, including skin temperature and, if applicable, menstrual cycle, as well as sleep quality, for $400. It will also last up to a week on a single charge. It's also debuted its Galaxy Watch Ultra, made of titanium with sleep apnea detection and two-day battery life, for $650.