37 keys piano keyboad instrument Material:silicone CE,RoHS,FCC Dimension:keyboard 264x144x6mm console 190x80x32mm NW:618.5g Standard 37 Simulation Keys,8 rhyhm keys, 8 sound ... mode, Dimension: keyboard 264x144x6mm console 190x80x32mmN.W.:618.5g4.100% waterproof3.External DC input 2.External phone output1.pucker punction of electronic keyboard