Echo modeler = whole history of analog, tape, and digital delay effects. Eliminates acoustical environments with DSP. (Vintage tape based echo over warm analog BBD delay to clean hi fi digital delay. Controls: Mode, time, repeat, mix, mod, type, and trails. Blue LED status light. Runs on 9V battery and optional DC power supply PSU-SB. The Echo Machine is essentially 11 delays in one pedal: Ping Pong, Reverse, two different multi-delays, Tracking, Sweep, Swirl, Slap and three different tap modes. New In Box, condition #10