For sale is a nice Boss Katana Mini amplifier. These are excellent, portable amplifiers that can be powered either by 6 AA batteries or an external power supply (not included). It is in excellent working condition and has been tested. The aux input is a great feature as you can jam along with music or use it as a portable speaker. Features: -Clean, crunch, and brown settings -Power rating: 7 Watts -4" Speaker -3-Band eq -Built-in delay -Aux input -Speaker-emulating headphone/recording output -Can be run either off of 6 AA batteries or a power adaptor (adaptor not included)