Using GPS to provide speed reading speed of information services
Accelerated to 10 per multiples, we will in accordance with 10, 20, 30, ...., 140 reads your current speed,
When the deceleration to +9 for each multiple of 10 will be in accordance with 140, 130, 120, ...., 0 to read speed,
Mainly used to remind motorists of the speed of the current and reduce the chance of inadvertently speeding.
When the speed is more than 150, it will only read 0.

Vice-function:
1. Calculate the total mileage
2. Calculate the average speed
3. Record max speed
4. Record start time
5. Display the direction
6. Display the altitude
7.Shows the route traveled
8.Speed Limit Alarm.
9.display the line chart of real-time altitude and speed within the lastest 5 minutes.
10.Support multi-task, can work in background.

Notice: Continued use of GPS running in the background can dramatically decrease battery life.