... well prove our most competitive prices and dependable qualtiy. Standard 61 Simulation Keys,Sustain function, Vibration function, 10 Demo Songs,100 tone ... /Fill-in, 16-stage volume adjustable,32-stage tempo speed, 61 keys roll up electronic keyboard can be rolled up, very convenient ... for quiet practice (headphone not include) Ideal for children beginners 61 keys Roll up electronic keyboard