Control Panel LEVEL Knob：Controls the delay mix level.When using ENTER LOOP mode, the LEVEL knob will become your LOOP LEVEL to control Phrase Loop volume. Delay Type Selector: This is a 5-way rotary switch. You can choose the delay type as ANALOG, TAPE, DIGI, MOD., and VERB. PARAMETER: For Analog Delay, PARAMETER controls Modulation Depth. Increase to get wider modulated sound. For Tape Echo, PARAMETER controls signal saturation. Increase to get more saturated and distorted sound. For Digi Delay, PARAMETER controls signal hardness. Increase to get a more compressed and brighter sound. For Mod Delay, PARAMETER controls Modulation Depth. Increase to get a wider modulated sound. For Verb Delay, PARAMETER controls Reverb and Shimmer mix level. Increase to get more depth and a 3 dimensional feeling. TIME 1: Controls delay1's delay time. When in Tap Tempo, it becomes a sub-division according to current parameter. REPEAT 1: Controls delay1's number of repeats. TIME 2: Controls delay2's delay time. When in Tap Tempo, it becomes a sub-division according to current parameter. REPEAT 2：Controls delay2's number of repeats. TAP Footswitch: Tap this foot switch to adjust the speed and delay sub-division. You can set the target sub-division by TIME 1 and TIME 2 knobs, then TAP this foot switch to adjust the speed, the DELAY 1 and DELAY 2 will change the delay time according to the current sub-division note signature. Hold this foot switch for 2 seconds, to switch current delay time between MS or BPM. OLED Display: Shows current Delay type, and delay time in MS/BPM. LOOP Mode: Press ON and TAP foot switch simultaneously, to enter / quit PHRASE LOOP mode. In LOOP mode, press ON foot switch to activate REC/PLAY/DUB and hold to UNDO/REDO as a normal looper pedal. OLED display shows your phrase loop status. LEVEL knob becomes LOOP LEVEL to adjust phrase loop volume. (Pedal will remember the current delay mix level when you enter LOOP mode.) All other knobs work in normal mode independently. Input/Output IN 1 (MONO): If you only connect with IN 1, then IN 1 signal will run DELAY 1 related to TIME 1 and REPEAT 1 knobs for OUT 1. Pedal will copy IN 1 signal to run DELAY 2 related to TIME 2 and REPEAT 2 knobs for OUT 2. If you connect using IN 1 and IN 2, then IN 1 and IN 2 will run DELAY 1 for OUT 1 and DELAY 2 for OUT 2 separately. IN 2: If you only connect with IN 2, then IN 2 signal will run DELAY 2 related to TIME 2 and REPEAT 2 knobs for OUT 2. Pedal will copy IN 2 signal to run DELAY 1 related to TIME 1 and REPEAT 1 knobs for OUT 1. If you connect with IN 1 and IN 2, then IN 1 and IN 2 will run DELAY 1 for OUT 1 and DELAY 2 for OUT 2 separately. OUT 1 (MONO)：OUT 1 signal is related to DELAY 1. OUT 2: OUT 2 signal is related to DELAY 2. USB Port: You can update firmware using the USB port. Please check our product page "Support" and follow instructions. DC Jack: Use ONLY: 9V Negative Tip power with 300ma. Connection