This article is in need of a technical review.
This feature is non-standard and is not on a standards track. Do not use it on production sites facing the Web: it will not work for every user. There may also be large incompatibilities between implementations and the behavior may change in the future.
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.