EQ700 : Not of serviceable quality

I ordered this to adjust the EQ of my guitar and boost the signal. The problem was that, on a battery, the pedal added noise to the signal, a heavy hiss in a rotating phaser type of pattern. This was exaggerated by the dirty tone on the amp. On the power supply it was even worse. The body is very plasticky and poor quality. The way the unit opens to change the battery is a joke. You have to remove the foot stitch by means of a spring loaded plastic piston at each side which you have to somehow at the same time, and replacing it is even more difficult. I was afraid I would break it. The EQ and the Db boost worked as it should, but there was just too much noise, so I returned it for a refund .............. :-(