49 keys piano keyboard instruments Material: silicone,foldable/waterproof 6 Demo 10 rhythms 16 tones CE,FCC,RoHS ... /Fill-in,16-stage volume adjustable,32-stagetempo speed,Dimension: keyboard 725*172*4mm,console 92x213x27mmN.W.:820g5.100% waterproof4.Automatic ... .External DC input2.External phone output1.pucker function of electronic keyboard