Typically known for their bluetooth headsets, Jabra announced yesterday the Speak 510 Series of devices for the mobile worker. The Speak 510 was designed for people who need audio conferencing on the go. The device can be plugged in via a USB cord or used wirelessly using Bluetooth for your smartphone or tablet. The 510+ cuts the cord and uses a USB dongle to wirelessly connect devices. Both come with 15 hours of talk time, a travel case and work on PC’s and Mac’s alike. The 510 is now available on Amazon for $149.99 with the 510+ coming out later this March for $179.99.