This feature is not on a current W3C standards track, but it is supported on the Firefox OS platform. Although implementations may change in the future and it is not supported widely across browsers, it is suitable for use in code dedicated to Firefox OS apps.
class property value provides the Bluetooth "Class of Device" number of the device. This number provides much information about the device's capabilities. See the Bluetooth specification 4.0, section 6.26 for further information about the meaning of that number.
var CoD = instanceOfBluetoothDevice.class
Return a number.
Not part of any specification yet. It should be discussed as part of the W3C's System Applications Working Group.