Mooer M721 Groove Loop x2 Stereo Looper & Drum machine Effects PedalThe Groove Loop X2 aims to serve as the ultimate looper and drum machine combo pedal whether in the practice room or on stage. The X2 looper features a whopping 14 save slots that can store loops of up to 10 minutes in length in each slot. Looper controls are familiar and flexible with the ability to toggle count in mode on off and an automatic mode that detects and begins the looper once an instrument signal is detected. Time Stretch functionality is