This app controls a Hands-Free LED Light.
(This app does not work without the specific Hands-Free LED light)
The app uses the Hands-Free Light to indicate vehicle speed over the current speed limit. The Hands-Free Speed Limit app uses a web service for getting speed limits.
Hands-Free Speed Limit can work in the background, the phone is free for other tasks.
For more information about Hands-Free Light visit
http://handsfreeLights.com
Please Note:
Continued use of GPS running in the background can dramatically decrease battery life.