Features: Compact size desk-top multi-effects pedal with high brightness LCD display and convenient touch key-press. 6 effect blocks containing 39 types of effects in effect chain: 2 auto wah, 10 overdrive distortion, 7 amp models, 11 modulation, 5 delays, 4 reverb. 40 drum patterns and 10 metronomes; tap tempo function for use with the drum machine, metronome and delay effects; built-in tuner(435Hz-445Hz tuning range). 99 factory presets and 99 user presets, and 4 quick recall buttons(A, B, C, D) provide an easy way to instantly store and recall 4 of your favorite presets. Dual power supply choices: DC 9V power adapter(included) or 2 * AAA batteries(not included); equipped with 1/4 mono input output jacks, and 1/8 stereo headphone AUX IN jacks.