This is a Parametric EQ pedal from Empress Effects.
For details, please visit their website. Here is a quick overview:
* EQ/boost pedal with linked or independent switching
* 27V internal operation for high clean headroom
* 3 parametric bands with 15dB of boost/cut
* Variable bandwidth per band
* High-pass, low shelf, high shelf, and low-pass filters
* Foot switchable boost with up to 30dB of gain
* True or buffered bypass
It is like new and my asking price is $300. Current MSRP is $374 before tax and shipping.