The EHX Neo Mistress Flanger presents the lush flanging Electro-Harmonix is noted for. True to the classic Mistress, the Neo’s design adjusts the harmonic sweep to present the varied tonal density that flanging brings to musical performance. Manual filter matrix also included. Electro-Harmonix flanging takes advantage of the Feedback control to determine how much of the processed signal is fed back to the original. Always one of the sweetest modulations, the Neo Mistress presents professional flanging at a breakthrough cost. Classic Flanger sounds with sweep and speed control Filter Matrix Mode Freezes the sweep of the flanger allowing manual control of the flanger setting True Bypass 9V battery included