Press the top button to wake it up.
If the screen is blank it needs charging - you'll find the micro USB charging cable in the box behind your Beeline device.
Pop your Beeline out of its strap:
Plug it in for a few hours, and your Beeline will have enough juice for 30 hours of riding (10 hours with backlight on) and at least a month on standby.
** Please note that there is no "off" button for the Beeline Velo. **
The Beeline will automatically go to sleep when not used for a short period of time to save battery.