Professional piano manufacturer. The children’s piano has been certified by CPC children and complies with the RoHS safety certification. 61-Key Multi-Function Piano – Product Size: 24.8 x 7.9 x 2.4 in. Microphone size: 5.5 in. Play piano function + mount mode + detachable microphone + keyboard drum + record playback function + auto sleep function + 16 tones + 10 rhythms + 6 demos + 8 percussions. Other Functions: Song Record and Play Function, Single Finger Chord and Fingered Chord. Microphone Included. Trailer Power Supply Methods: The first method is powered by four 1.5V “AA” batteries (not included). Another way is to connect the DC power connector of the USB power cable is connected to the power connector on the back of the keyboard