88 Spring Force Keyboard The professional dynamic keyboard can obtain different sound levels through different key speeds, making the performance of music more rich and delicate. Support Multiple Devices Support USB MIDI and BT wireless connection to mobile phone/iPad/PC for music games or customize your own music. Dual Keyboards and Dual Tone Settings The digital piano features a dual partition keyboard and dual tone settings. It can be divided into two parts to play two different tones at the same time.