Device properties.
This module is included in phonon-core.js.
require(['phonon-core'], function(phonon)) {
var os = phonon.device.os;
});
phonon.device.os
phonon.device.version
You can fetch more browser and device properties with platform.js like the name of the manufacturer, product, architecture etc.
phonon.device.platform // access the platform object
phonon.browser.name
phonon.browser.version