The Electro-Harmonix Q-Tron Plus takes all the tone and function of the standard Q-Tron pedal and adds a handy FX loop and switchable attack response. Use the loop to place other effects in between the preamp and filter, and the attack control adds a slower and smoother ramp up for vowel-like sounds in addition to the standard Q-Tron's fast, biting response. Grab an EHX Q-Tron Plus today and bring the funk.