ake / manufacturer: AiM 
model name / number: SoloDL 

Mazdaspeed AiM soloDL lap timer and data acquisition device. 
It can be used on all Mazda vehicles. It has high-speed GPS, internal accelerometers, expansive memory and offers USB download. Beyond just a data logger, it's also a predictive lap timer offering a constantly updating display of your current lap pace or, if you prefer, a plus or minus time from your best lap time. 
The data logging includes lap times, speed, track position, lateral and longitudinal g-forces, yaw rate and more, all at a rate of 10 Hz. At the end of a session, you can download it to a PC or just hit the memory button to see your three best lap times, or even your full lap-time history. Downloaded to your PC, you can create split times to see sector times for each lap. This nifty little feature will also tell you what your theoretical "best lap" could be. 
$699.00 usd .
Vehicle data logging pulled in from the OBDII port or from many aftermarket ECUs. You can log RPM, temperatures, throttle position and many more parameters to go deeper in your analysis. You may think you were flat-out through the Kink, but the data can tell you if you truly were or not. 
The SOLO DL can access data on the 2006-on MX-5, the RX-8, Mazda3, Mazdaspeed3 and the Mazda2. 
Sells for $699 USD plus taxes.