1. The 49-key rollable keyboard is a standard keyboard. The keyboard can be rolled up, small in size and easy to carry. 2. The keyboard surface has function keys for easy adjustment of your favorite rhythm. 3. 8 sets of drum rhythms, one key one sound, recording and playback function, 16-level volume control, 32-level beat control, automatic sleep power saving function. 4. Built-in 16 tones, 10 rhythms, and 6 demonstration songs for learning and appreciating classic songs. 5. The built-in speaker has a mellow and crisp sound, melodious and pleasant, external headphones, and external DC power supply. Power supply:3 x AA batteries or DC 6V adapter (Note: power supply and batteries are purchased separately) Electronic keyboard size: Control box:10x 22.2 x 2.2cm Keyboard:73 x 17.1 x 0.3 cm Colour:Pearlescent White Material:Silicone Package Contents: 1 * 49-key portable electronic piano 1 * USB power cable 1 * Chinese and English instruction manual