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 hot 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