Grace Design REX, Microphone Preamp Pedal, 1 Channel, Switchable high-pass filter: 75 Hz, High and low shelving EQ, FX loop with separate send and return connections, Variable boost circuit, Mute switch, +48V phantom power, 1 Microphone input: XLR, 1 DI output: XLR, 1 Amp output: 6.3 mm jack, FX send / return: 6.3 mm jack, Dimensions (H x W x D): 63.5 x 130 x 114 mm, Weight: 0.4 kg, Includes external power supply unit