The Voyager 510-USB and the .Audio 910 come with the same Bluetooth headset and USB dongle adapter. Therefore, both headsets have the same specifications.
The differences between the products are in the package contents.
The Voyager 510-USB is designed for office use and comes with an AC charging adapter, a charging stand, a travel pouch, and a USB extension cable.
The .Audio 910 is designed for home use. It does not contain the extra accessories that are included with the 510-USB.
Click herefor more information about the Voyager 510-USB.
Click herefor more information about the .Audio 910.