The CamerAlert database can be installed on many of the available SatNavs from leading manufacturers like TomTom, Garmin, Navman, Mio and more!
This one of the best systems around.
This is about as easy as it gets. Link to your database account and allow auto update. My husband has used these speed camera alerts for a few years on his phone and satnav. So pleased it works on my Motorola Xoom.