It's a 2-channel autotune designed to be inserted in the signal chain between a portable player (iPod) and an auxiliary input jack. There's a microphone in the top, so you plug it in, hold it in front of your face, press and hold "Setup" wait about 5 seconds for the sweeps and it tunes the car.
The target curve is very similar to MS-8's. One setup is complete, you can adjust the level of the bass shelf in three steps (Bass control), the width of the transition band between the bass boost and the midrange (Impact control), the high frequency tilt (Treble) and you can turn time alignment on and off (Image). The defeat button turns off all of the processing.
It's powered by a cigarette lighter adapter (6V) and audio from the portable player turns it on and off.
It doesn't use the same algorithm as MS-8. This one uses an FIR filter that's partitioned. there are 256 points below 1K and 256 points above 1k. That provides a little better than 4Hz resolution in the bass and about 75Hz resolution above 1kHz. It runs at 48k, so time alignment is adjusted in 1/4" (one sample) steps.
In addition, there's an elliptical filter at 40Hz that can be engaged and disengaged. When it's engaged, it eliminates everything below about 40Hz, which is great for cars with small speakers and no subs. Out of the box, the filter is engaged. You press and hold the Bass button to disengage it. It can be engaged or disengaged either before or after setup.
Once setup is complete, the coefficients are written to flash, so it will remember the settings when the power is off. It doesn't remember more than one car, but setup takes about 5 seconds, so moving it from one car to another is simple. The power connector is a standard barrel connector, so finding an AC/DC power supply is easy--Radio Shack. You can use it at home, on your PC speakers or just about anywhere. It's about the same size as a big bar of soap.