Jabra's Sport Pulse and Sport Coach wireless headphones have been available for some time now, but the company has new versions of both models with some added features. Let's start with the Sport Pulse Special Edition, shall we? The heart-rate tracking in-ear headphones debuted in 2014, but now they gain automatic and continuous VO2 Max level monitoring thanks to a hand from the Jabra Sport Life app. If that term is unfamiliar, VO2 Max levels are a measure of aerobic fitness, or to put it another way, how efficiently your body uses oxygen. The new version of the Sport Pulse also offers coaching based on your heart rate and fitness level during exercise sessions.