Only used a few times indoors after being purchased new. The original box will be wrapped in cushioning material and wrapping paper for shipping. This is an effects unit that can be used not only for electric-acoustics, but also for acoustic guitars, wind instruments, vocals, etc., by picking up the sound with a microphone connected to the adapter and applying effects. The separately sold genuine AC adapter AD-16A/D is also included (photo 4). Multi-effects processor for acoustic instruments, with expression pedal. - Model name: A1X FOUR - Accessories: MAA-1 microphone amplifier - Package contents: With expression pedal - Function: Multi-effects processor - Design: Designed for acoustic instruments