Feature:1. 37 Keys Design: The keyboard is designed with 37 keys, and the portable guitar keyboard can be carried and played at any time.2. With 32 Note Polyphony: 32 notes polyphony is suitable for beginners to practice, allowing continuous notes to sound without being cut off.3. With Lithium Battery: The 37 key keyboard piano has built in lithium battery, you can play directly by pressing the switch.4. Natural Stereo: Advanced wave memory stereo sampling to reproduce natural instrument sounds in stereo.5. Multifunctional Keys: With volume adjustment key, demo song duo, stop button, audio jack, headphone jack, microphone function, single speaker.Specification:Item Type: 37 Key Keyboard PianoBattery: Lithium battery 3.7V 1200mAh (built in)Product Size: Approx. 55 x 11.2 x 3.8cm or 21.7 x 4.4 x 1.5inFunctions: 4 tones, 10 demo songs, volume adjustment, demo song joint singing and electro singing, stop button, volume knob, audio jack, headphone jack, microphone function, single speaker..Package List:1 x Electronic Organ1 x Strap1 x USB Cable1 x Connection Line1 x Microphone1 x User Manual