The Moodmetric ring uses Bluetooth LE to send data to a smartphone. The data is then used to create the user's "emotional intelligence" profile via the accompanying app. It does this by using sensors that measure the body’s nervous system via the skin's conductance.
In terms of form-factor, the ring has been designed by Vesa Nilsson & Tiina Arkko of OZ jewel. It is elegant but quite bulky and is clearly aimed at female customers. It looks a little similar to a range of smart rings by Kovert, which is not necessarily a bad thing depending on your aesthetic tastes. My point is that when making a visual design statement you risk alienating a percentage of potential customers, who may like the functionality, but not the form. A better approach could be to offer a more neutral design with the same functionality, or even make it invisible. An example of a more discreet wearable that can be worn out of sight beneath clothing, is the AmpStrip.
The Moodmetric will be available in Black polycarbonate and steel for $179 (£118), however a hand-crafted 14k gold version, that features a black agate stone and gold plate, will be available for $3,950 (£2600). The estimated shipping date has not yet been announced.