The Qstarz BT-Q1000eX, with 5Hz log speed, can log up to 5 times per second to accurately measure speed, distance and track in vehicle races. This GPS Lap Timer is perfect for road course autos, motorcycles, super moto, oval cars etc races. Simple and easy to use, this Qstarz GPS Receiver uploads your driving information to your PC via Bluetooth or USB. The Lap Timing Analysis software in the Qstarz BT-Q1000eX helps analyze your performance so that you can do better in the upcoming races. An integrated vibration sensor in this Qstarz GPS Receiver puts the device to sleep in case it has not detected movement for ten minutes. The battery of this GPS Lap Timer lasts for almost 42 hours which is indeed a lot of time.