1There are function hot keys on the keyboard surface, which is convenient to adjust your favorite rhythm. 2With 16 built-in tones, 10 rhythms, 16-level volume control, 32-level beat control, and 6 demo songs at the same time. 3With automatic sleep and power saving function, earphones can be connected, so that you can practice without disturbing others. 4With USB connection, can be connected with DC power supply to realize charging function. 5The 49-key foldable electronic keyboard is small and easy to carry after folding. 6Designed for children and beginners, the sound is very clear and full of energy, just like a real piano. Item Type: Electric Piano Keyboard Material: Environmentally friendly silicone + electronic components + ABS ElectricKeyboard Unfolded Size: Approx. 83 x 22.5 x 3cm / 32.7 x 8.9 x 1.2in Use Batteries: 3 x AA batteries (delivered without batteries) Power Supply Mode: USB interface charging 1 x ElectronicPiano Keyboard 1 x Connection Line 1 x Chinese and English User Manual The recording function needs to press the "Record" button at the up and the indicator on the right side lights up before the recording function starts. The recording function can only retain the song just recorded, without the storage function.