https://youtu.be/PCBZaV5YZ1M Product Information: Envelope controlled filter is an effect type that ventures beyond the mainstream yet is equally at home in a wide range of genres and equally effective on guitar, bass, keys, horns and more. Electro-Harmonix is a pioneer in this effect category and has been making envelope controlled filter pedals since the 1970s! The Nano Q-Tron springboards off that deep heritage. Product Features: Pedal type: Envelope Controlled Filter Vol (Volume) knob which controls the pedal’s output volum Drive Control adjusts its filter sweep sensitivity and how the pedal responds to the user’s playing dynamics Q Control sets the peak bandwidth of the filter and determines how subtle or dramatic the effect will be LP BP HP Mode Switch controls what frequency range the filter will pass. LP (low pass) emphasizes the lows, BP (band pass) the midrange and HP (high pass) the highs Pedalboard friendly, compact, rugged enclosure True Bypass switching Comes equipped with a 9Volt battery For more information and specifications, please refer to the manufacturer’s website