Introductions:Glarry GEP-104 61 Key Portable Keyboard complete with 300 timbres, 300 rhythms, 30 demo songs and LCD display with 3 teaching modes(Single-finger; Follow; Concert), it's perfect instrument for a beginning player. Complete with built-in two stereo speakers provide excellent sound quality, At the same time we also give away one headphone so you don't worry will disturb others' relax when you are playing.GEP-106 61 Key Portable Keyboard provides 2 ways to power: DC 9V or 6 pcs AA batteries (not included) and you can play music anywhere! At the same time, we have functions: USB Music Player; Support Audio input; Master Volume Control; Accompanied Volume Control; Transposition; Tempo; Record; Playback; Demo one; Demo all; Sustain; Vibrat.