Auto-chromatic tuner pedal for guitar, bass and other music instruments Sturdy die-cast metal housing with heavy duty on/off footswitch and LED indicator – 1/4″ jack input and output – 9V DC power supply required (not included) or 9V battery with adaptor (not included) – Weight: 240g / 8.46oz – Dimensions: (D) 95mm / 3.74″ x (W) 45mm / 1.77″ x (H) 48mm / 1.89″