First go to this website: https://jawbone.com/devices

• If you're not already, you'll have to sign in

• In My Devices, click on BIG JAMBOX

• Follow the instructions to download and install the Jawbone_Updater-x.x.x.exe and click continue

• Then be redirected to the Voices and Tones page, which are the .dfu files

• Choose a voice you like and download it

• Now the speaker must be turned off and connected with the USB cable to the computer

• Double-click on the file (the Jawbone_Updater must NOT be running for this to work, you'll know if it is running if you see the "J" icon on the task bar (bottom right on Windows and I believe upper left on Mac) click it and then click "quit")

• After double-clicking the file click OK on a window after finding your speaker

• Now you just have to wait, the "J" icon will appear and become red and if you click on it you can see the percentage. This takes around 5 to 10 minutes.

DO NOT UNPLUG THE SPEAKER OR TURN OFF THE COMPUTER WHILE IT IS UPLOADING