(A)Technology Parameter: [1]49 keys [2]16 Tones and 10 rhythms [3]8 percussion sound effect [4]6 demonstration songs [5]Volume and tempo control [6]Rhythm editing/recording [7]Sleep function [8]One key one note function [9]Guide function [10]Single-finger chord/multi-finger chord/fill-in [11]LED display [12]Headphone Jack [13]Runs on 3 “AA” batteries or plugs into outlet with AC adaptor (Purchase separately) (B)Dimensions: 83(W)*18(D)*4(H) cm (C)Power Supply : 3 “AA” Batteries/4.5V 100mA (AC Adaptor) (D)Packing : 18PCS/ 0.06m3 (E)Loading : 20’: 9180 PCS 40’:18900PCS 40’HQ: 22500 PCS