A: Descriptin: SAPHUE Electric Guitar Vintage Overdrive/Volume/Tone Knob Pedal Effect Mini Single Type DC 9V True Bypass Representation of the classic Screamer Tube, the overdrive effect is mellow, mellow, smooth-just outstanding! Also nice sustain. True bypass design minimizes loss of tone. Aluminum alloy housing with paint finish. Features: Power Supply: 9V DC (Not Included in This Package) Input & Output Jack: Single 1/4 inch (Instrument Cable). LED light: LED indicator shows the working status. True Bypass: Minimizes tone loss. Full Metal Shell: Aluminum Alloy Housing with Lacquer Finish B: Descriptin: SAPHUE Electric Guitar Drive Pedal Gain/Level/Tone Knob High/Low Frequency Pedal Effect Mini Single Type DC 9V True Bypass The drive pedal gives you rich, bordering on distortion overdrive, surpassing what the LED tube amplifier can provide. Open it up and find the kind of response and spacious harmonics of the large overdriven tube amp. Aluminum alloy housing with paint finish. Features: Power Supply: 9V DC (Not Included in This Package) Input & Output Jack: Single 1/4 inch (Instrument Cable). LED light: LED indicator shows the working status. Full Metal Shell: Aluminum Alloy Shell with Lacquer Finish C: Descriptin: SAPHUE Electric Guitar Crunch Guitar Effect Distortion Gain/Volume/Tone Knob High/Low Frequency Pedal Effect Mini Single You