I was very suspicious that this functionality simply wouldn't work as advertised, but a comparison to a range of professional health devices and a good old fashioned pulse check confirms its accuracy beyond doubt. The heart rate monitor, which Fitbit dubs 'Pure Pulse', works particularly well, utilizing two low intensity green LEDs, which constantly pulse on the skin to detect blood volume changes in your capillaries. Users can elect to skip, or change the order they appear via the desktop app. Cycling through the options give you quick access to the step count, your heart rate, calories burn count, distance travelled and floors rose. The single line, monochrome OLED display is bright and easy to read, albeit small and admittedly unimpressive, but it does help to keep the device to a slim figure and it does include some useful features such as a clock, (with a number of face options) alarm, and incoming call notifications from your Bluetooth equipped smartphone with a gentle vibration. An altimeter keeps tabs on your height, with each incline of 3 metres counting as a floor. At its core, the Charge HR employs the same MEMS 3 axis accelerometer used in many competing bands, which provides much of the core functionality of the band, including steps taken and distance traveled (note there's no GPS on board) with excellent accuracy. In a fairly small and non-descript black band (more colours coming soon, I'm told), the Charge HR comes packing a solid amount of tech, even if hardly sets the world on fire with cutting edge science. Popular Now: First private spacecraft to make historic landing on the Moon today
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