Introductions:If you are looking for a piano that you can take anywhere, anytime, we recommend our 61 Keys Dual-power support Roll Up Piano, built-in speaker, travel, outdoor, at home, at school, you can play in any places you like. You can connect external headset while playing so as not to disturb others and enjoy music anytime and anywhere. This piano has 128 excellent tones and equipped with 128 rhythms and 30 demos and MIDI chips technology. It is suitable for piano beginners or beginners in arranger. Features:1. Dual-power support for USB-powered computer, or 4 pcs 1.5v AA battery powered. (4 pcs 1.5v AA battery not included)2. Support External speaker or Headphone use3. MIDI output Can be connected with computer to edit the music you make. (MIDI cable not included)4. Comes with 128 excellent tones, 128 rhythms and 30 demos, suitable for piano beginners Specifications:1. Material: Silicon Plastic2. Color:Black White3. Keyboard model: 61 key standard piano key4. Tone:128 International standard tone5. Rhythm:128 International standard rhythm6. Demonstration songs:307. Power supply: USB-powered computer or 4 pcs 1.5v AA battery powered. (4 pcs 1.5v AA battery not included)8. Piano Dimensions:(39.7 x 6.3 x 1.2)inch/ (101 x 16 x 3 )cm9. Piano Weight:2.2 lbs/ 1.0kg Package included: Package Includes:1 x Roll-Up Piano1 x USB cable1 x English Manual