Hobbico Pro Series Big 5 GPS MeterThe Hobbico Pro Series Big 5 GPS Meter is a tiny device that can track HUGE performance data! Its so small, you can stuff it in your shirt pocket and you will forget it's there. But once you retrieve the performance data, you will never forget to take it with you. The on board battery is good for about 2 1 2 hours, and it has memory for up to 6 hours of data. It can be mounted easily with double sided tape or hook & loop strips, and begins satellite