The boss katana mini with power supply is the perfect solution for any guitarist wanting a portable practice amp which they can also use at home without batteries. Delivering 7 watts of power through a specially designed 4 inch speaker the katana mini is perfect for jam sessions and practise at home or on the move. Players can choose from three amp types including brown crunch and clean giving plenty of options to create the unbeatable sounds the katana range is renowned for. The katana mini runs on an optional power supply or 6 aa batteries allowing you to take great tone anywhere with its ultra compact design and integrated carry handle. Other features include an aux input for smart phones and mp3 players a built in tape style delay and phones recording output with cabinet voicing. The roland psb 1u power supply also provides permanent power to this machine so you can play for hours on end.