DIGBETH bass preamp, 2 channels, tube and transistor type preamp, 3-band EQ, TILT function, DI output (XLR Pre/Post EQ), effect loop, 3.5 mm headphone output, 3.5 mm auxiliary input, operation on 9V power supply not included, dimensions: 15 x 12.5 x 6 cm, weight: 0.75 kg.