by Boss

The RC-3 Loop Station Pedal from BOSS is a compact and powerful stereo stompbox looper with internal memory that runs on a single 9-volt battery or optional AC power supply, and allows up to three hours of stereo recording time. With 99 onboard memory slots for storing loops, a USB 2.0 port for transferring WAV audio to and from your computer, and a drum loop player including Rock, Pop, Funk, Shuffle, R&B, and Latin patterns, the RC-3 is a powerful tool for practice, composing and creating loop based effects such as ambient background textures.

AUX Input
In addition to recording your guitar or bass performances and turning them into playable loops, you can also record other external stereo audio sources via the RC-3's AUX IN. Sound from a digital-audio player connected to the AUX input, for example, can easily be recorded and made into a loop
Auto Record
The Auto Recording feature starts recording the moment you begin playing your guitar, or as soon as you start a connected audio player. Count-In mode gives you one-bar of rhythm before recording starts. You can Undo/Redo as you go. The pedal allows for up to three hours of recording time