Specification: Product Weight: 49 Keys:2.45kg;  61 Keys:2.95kg;  88 Keys:4.25kg;  Product Size: 49 Keys:760X179X43mm;  61 Keys:921X179X43mm;  88 Keys:1290X179X43mm;  Output Power:15WX2;  Pedal:Sustain/Vibrato function;  Tones:128 tones, 127 rhythms;  New Sound Features:Dual keyboards, dual tones, DSP digital reverb, keyboard drums, class D high-fidelity functions;  Power Supply Mode:USB 5V external power supply, built-in 2000ma lithium battery power supply;  Interface:USB/MID programming interface, MP3 audio input, earphone/audio pedal, microphone;    Features: - Adopt French Drean tone, ten-level sampling, 3D stereo surround sound, let you feel like being in a concert hall.  - Dual keyboards, tones can be freely matched, such as playing acoustic bass with the left hand and piano with the right hand.  - Dual tone, two keys are pressed, and dual tone comes out, first to pursue strong contrast, and second to avoid boring monotony.  - Via Bluetooth, the mobile phone can be connected to the electric piano to play music, and the electric piano can be connected to the Bubble Piano APP.   - It adopts aerospace-grade light aluminum shell, and the portable design of the 88-weight 4.25kg electric piano can carry it to different occasions.    Note: Due to manual measurement, please allow an error of 0-1 cm.    Package Included: 1 x Electric Keyboard;  1 x Recharger;  1 x Plug;  2 x Data Lines;  1 x Manual;  1 x Bag