Roll piano 37keys (Piano3702)

16 kinds of instruments / 99 kind of rhythms        
10 demo songs          
External speaker out jack          
Earphone jack/ DC adapter jack          
Power supply: 3 AA batteries or          
A 6 voltage AC adapter, 100mA          
Octave: Has 3 full octaves          
Size: Keyboard: 56(L)X 12(W)X 0.6(thickness) cm      
Control: 8 (L)X 13.1(W)X 2.8(thickness) cm        
Box size: 41(L)x17(W)x4(H) cm          
24 pcs/Carton          
Carton size: 42(L)x33.5(W)x52(H) cm          
N. W. /G. W.: 13.2 KG/14.7 KG