Concertmate-670 (420-4012) Specifications Faxback Doc. # 8766 Number of Keys...............................................49 (full-size) Polyphonic.................................................8-note (maximum) Preset Tones............................................................100 Auto-Rhythms............................................................100 OUTPUT Jack....................................(output impedance: 120 ohms, .............................................output voltage: 2.5V(RMS) MAX) AC Adapter Jack.....................................................(DC 9V) Built-In Speaker.................................................12 cm dia. Power Source.....................AC: 120V, 60Hz, with AC adapter (273-1656) ....................................................DC: 6 AA size batteries ..................................DC adapter for vehicle battery (270-1562) Power Consumption......................................................7.7W Dimensions..........................................83 x 878 x 260 mm (HWD) .................................................3-1/4" x 34-5/8" x 10-1/4" Weight..................................3.5 kg (7.7lbs) including batteries (RLR-01/12/94)