The Green Rhino Overdrive Mark IV is more compact than its ancestors, but it has more force than ever behind its mighty charge. In addition to the Volume, Tone, and Drive controls of the original, this beastie has the MkII’s 100Hz control and an all new 500Hz control so you can cut or boost your lows and mids by 12dB each way. • Smaller, more pedalboard-friendly housing • 100HZ and 500HZ controls for shaping mids and lows • Classic switch recalls the tones of the original Green Rhino OD