L.R.Baggs Voiceprint DI, Impulse Response di pedal for acoustic guitar, Voiceprint DI measures the acoustic response of your guitar by leveraging the processing power of your iPhone® to accurately capture your guitar’s one-of-a-kind voice., Notch filter, Anti-feedback function, Phase circuit, Serial FX Loop, PAD circuit for adjusting the input signal (from 0 dB to -9 dB), 99 Save instrument presets, Mute switch, Apple iPhone 6 or later, free ""AcousticLive"" app required, Input: 6.35 mm jack, Output: XLR and 6.35 mm jack, Ground lift switch, USB port, Mute and bypass circuit, Includes power supply