Cosworth Electronics 5Hz Pi GPS Receiver - Lap Timer
The Pi GPS receiver tracks and uses multiple satellites for fast and accurate measurement of both position and velocity. Its nonvolatile memory does not require battery backup while an on-board rechargeable battery can maintain the real-time clock for up to 10 days.
It has a waterproof polycarbonate body and can be used with either a magnetic or a screw down base.
-Accuracy: Better than 15 meters, (95% typical)
-Data updated: 5 times per second
-Cable Length: 1.5 metres
-Integrated antenna and compact rugged design