Features:Functions: 37 keys, 8 kinds of timbre, 4 kinds of percussion instrument, 8 kinds of rhythm, programming/learning function, recording/playback, volume adjustment, mic etc.Equipped with external microphone, kids not only can play the keyboard, but also can sing a song.Develop kids interest in music, let them learn, play and enjoy wonderful music.Made of premium ABS with fine workmanship and smooth edge, safe for kids.This 37-key keyboard is 16.7x6.5x2". Single speaker design, the speaker at the right side is for decoration only!Specification:Item Name: Electric PianoPower Supply: Plug into USB power port to charge(No built-in battery)Material: ABSColor: Black + WhiteProduct Size: 42.5*16.5*5cm / 16.7*6.5*2 inchesNote:Please allow 1-3cm (0.4-1.18") difference due to manual measurement and slight color variation for different display setting.