MULTI-EFFECT FOOT PEDAL FOR GUITAR VOX StompLab IIG Guitar Multi-Effects. The StompLab series of effects pedals represents an impressive advance in powerful sounds in a compact and sophisticated metal body. Sound variations are classified by style, such as rock, blues, and ballads, making it easy for even inexperienced users to select the desired sound. Nº of effects: StompLab IIG: 104. Nº of Programs: 120 (User = 20 / Preset = 100). Audio input: 1 (Mono). Audio Out: OUTPUT / PHONES (Stereo). Signal Processing: A / D Conversion: 24-bit, D / A Conversion: 24-bit. Tuner: Tuning range: A0 - E6, Calibration range: A = 438 Hz? 445 Hz. Power: AA x 4 batteries, DC 9V (Optional: AC adapter). Battery Life: 7.5 hours (Alkaline battery).