KATANA MINI amplifier. I purchased it last December, but I'm selling it because I've upgraded. It works without any problems. All warranty documents are included, and I will ship it in the original box (with some minor scratches). The delay is surprisingly good, and I was impressed that such a small and lightweight amplifier could produce this sound. * Powered by 9V 350mA or six AA batteries. * Features AUX IN and PHONE OUT jacks. - Brand: BOSS - Model Name: KATANA-MINI - Function: Portable guitar amplifier - Controls: Gain, Volume, Bass, Middle, Treble, Reverb, Level, Power - Input/Output Terminals: Input jack, Headphone jack, DC power jack - Power: Battery-powered - Size: Compact 〈Quote〉 BOSS's KATANA AMP series is a rock amplifier highly praised by guitarists for its sound that surpasses its class, authentic tube response, and rich effects. The KATANA-MINI inherits that sound in a battery-powered, portable size. Like stage-class amplifiers, the analog circuit that gradually increases gain achieves dynamic and expressive distortion. Equipped with a 3-band EQ similar to vintage amp circuits and a delay with warm reverberation, you can enjoy sound creation and performance that exceeds its class. It's a mini-amp that can be easily carried around due to its small/lightweight size and supports battery operation, allowing you to enjoy authentic rock sound in various situations.