Specifications:- Overall Dimension(LxWxH): 37" x 14" x 4 1/2" (93.98 x 35.56 x 11.43 cm)- Voltage: 100 to 240 V- Amplifier Power Output: 5 W- Power Supply: 110 V or 8 pcs D Size Batteries- Net Weight: 11 Lbs (5 kg). Package Contents:- 1x 61-Key Electronic Keyboard- 1x Music Notes Stand- 1x Ac Adapter- 1x Manual. Notice: - Please note that while plugged into headphones, the piano produces little noise and will not disturb your neighbors.