Indicator Led; Foot Switch; Output 1 (Mono); Output 2 - DigiTech HARDWIRE SP-7 Owner's Manual

9. Indicator LED - This LED indicates when the effect is turned on or
off. When battery power is low (approximately 15 minutes before end
of life), the Indicator LED will begin blinking to warn that the battery
needs to be replaced.
10. Foot Switch - Press the Foot Switch to turn the effect on and off.
11. Output 1 (Mono) - Connect this output to the input of a single
guitar amplifier, another pedal input, or an amp effects return.
12. Output 2 - Connect this output to the input of a second guitar
amplifier when a second amp is being used.
Note: Use unbalanced mono instrument cables only.
7