DL-500 High-Speed 5Hz Data Logger
This logger is not worth the time to click buy.  GPS technology is everywhere it all comes down to the ability to use the data that is recorded.  GiSTEQ is horrible.  I can't even get the logger to connect to the computer.  Once connected if it does work the data is horribly difficult to get out of the software provided.  Very bad product, not worth the time to write this review, except to save someone from the agony.