Specifications Nominal Input Level MIC IN: -40 to -12 dBu (variable) Input Impedance: MIC IN (Rear): 4.4 k ohms MIC IN (Front): 2.2 k ohms Nominal Output Level:  LINE OUT: -10 dBu Output Impedance LINE OUT: 1 k ohm PHONES: 24 ohms Memory: Scene memory: 8 Effect Type: ROBOT[1] NORMAL[2] OCTAVE-1[3] OCTAVE+1[4] FEEDBACK MEGAPHONE[1] MEGAPHONE[2] RADIO[3] BBD CHORUS[4] STROBO VOCODER[1] ADVANCED[2] VP[3] TALK BOX[4] SPELL TOY HARMONY[1] +5[2] +3[3] +3, -4[4] +3, +5 REVERB[1] REVERB[2] ECHO[3] TEMPO DELAY[4] DUB ECHO Connectors: MIC IN jack (rear): Combo type (XLR, 1/4-inch TRS phone), balanced (phantom power: +48 V, 10 mA Max.) MIC IN jack (front): Stereo miniature phone type (plug-in power) PHONES jack: Stereo miniature phone type LINE OUT jacks (L/MONO, R/BYPASS): 1/4-inch phone type USB port: USB type B MIDI IN jack USB: Audio Signal Processing: PC interface: 24 bits AD/DA conversion: 24 bits Sampling Frequency: AD/DA conversion: 44.1 kHz, 48 kHz, 96 kHz, 192 kHz Power Supply: Rechargeable Ni-MH battery (AA, HR6) x 4 Alkaline battery (AA, LR6) x 4 Obtained via USB port (USB bus power) Current Draw: 500 mA Expected battery life under continuous use: Alkaline battery (phantom power: Off): Approx. 6 hours Alkaline battery (phantom power: On): Approx. 4 hours Rechargeable Ni-MH battery (phantom power: Off): Approx. 7 hours Rechargeable Ni-MH battery (phantom power: On): Approx. 5.5 hours* This can vary depending on the specifications of the batteries, capacity of the batteries, and the conditions of use. Dimensions: 174 (W) x 133 (D) x 58 (H) mm 6-7/8 (W) x 5-1/4 (D) x 2-5/16 (H) inches Weight (including batteries): 554 g; 1 lb 4 oz Accessories: Owner's Manual Leaflet USING THE UNIT SAFELY Alkaline battery (AA, LR6) x 4 WATCH: Roland VT-4 Voice Transformer Performance Demo