The Electro Harmonix Micro Q-Tron is an effect pedal with a smooth envelope filter and a funky wah-wah tone.

The Electro Harmonix Micro Q-Tron has a filter wich is controlled by its internal envelope follower, analyzing the volume of your notes and the dynamics of your playing to directly sweep the filter's center or cutoff frequency. A stronger attack or louder note will produce a wider frequency sweep while softer playing produces more subtle effects. Use the Q control to make the effect more dramatic.

The Electro Harmonix Micro Q-Tron effect pedal main features include:

• True bypass.
• Drive control sets sensitivity and filter sweep range.
• Selectable low pass, band pass or high pass filters.
• Tough and compact die-cast chassis.
• Q control sets the filter's bandwidth from smooth to funky.
• 9-volt battery included.