Phil Jones Mobile Bass Amp HA-2, Mobile amplifier with digital audio interface, Power output: 300 mW, High-resolution USB audio interface, Compatible with most audio programs, Integrated analog/digital converter, Integrated headphone booster amplifier and preamp with EQ, Can be used to operate amplifiers such as PJB Bass Cub, Simple and easy to use recording tool for digital and analog recordings, High-quality Burr Brown digital components, Analog preamplifier with up to 12 dB gain, USB output with 44.1 - 384 kHz 24bit, 2-Band EQ with +/- 18 dB Boost / Cut per band, Rechargeable lithium ion battery for up to 8 hours of operation, Concentric controls for volume / gain and treble / bass, Power switch, Input: 6.3 mm Mono jack, Headphone output: 3.5 mm Stereo left, USB charging port and digital interface: Micro USB, Aux input: 3.5 mm Stereo jack, Aluminium casing, Power supply via internal lithium-ion battery or USB, Dimensions (W x H x D): 75 x 149 x 24 mm, Weight: 290 g, Includes soft-cover, 3.5 mm stereo jack cable and Micro USB cable