It's a QStarz 818XT.
Used to use it to log track days, don't have a track toy any more so I don't really have a use for this.
Will work with Android or a jailbroken iDevice.
$40 shipped, sells for $80 new on Amazon. (I'm also the one selling the used one on Amazon for $39.00, buy here and save $4.99 on shipping 
)
http://www.amazon.com/BT-Q818XT-Qstarz-10Hz-Bluetooth-Receiver/dp/B003YCZINA/ref=sr_1_1?ie=UTF8&qid=1382036034&sr=8-1&keywords=qstarz+818xt
If you've never used anything like this, this is what the logged data can look like using Harry's Lap Timer. http://www.youtube.com/watch?v=mZdkGznL7Vw
