Zoom 503 Guitar/Bass Amp Simulator Effect Pedal

in good working condition.

From Zoom:

• Compact multi-effect device convincingly recreates the sound of famous guitar or bass amplifiers. This is ideal for line recordings to a tape recorder or when playing your instrument via a hi-fi audio system. It also lets a fairly small guitar or bass amplifier sound more powerful and dynamic.
• Integrated amp simulator gives a wide choice of guitar/bass amplifier characteristics.
  Sophisticated cabinet simulator allows control over cabinet size, ringing, and even simulated microphone position. This makes it easy to create exactly the sound you want.
• Two input jacks with different sensitivity enable optimum matching to any guitar or bass, including instruments with single-coil magnetic pickups or active pickups.
• Ten types of high-quality effects such as chorus, delay, and reverb produce realistic ambience.
• You can switch between 24 patches to store diverse settings based on your preference.
• Integrated auto-chromatic tuner for guitar. You can tune your instrument easily anywhere, any time. You can also leave the tuning function disabled all the time.
• AUX input allows connecting the output of audio components such as a CD player, for mixing with the instrument signal.
• Dual power supply design allows the unit to be powered from a 9V alkaline battery
  (6L61) or an AC adapter.