bought this on line but it turns out that it's not an authentic Apexi even though the box said Made in Japan. i did hook it up to the car and everything function perfectly except it O2 voltage feature doesn't work. It's not crucial to the function of the turbo timer, so it's not really needed. i have since bought an authentic one, so i don't need one. it's has blue back light.

$30 shipped OBO