One of the most important factors when choosing a digital piano is the feel of the keyboard (known as the Keyboard 'Action'). A good keyboard action should accurately translate the expression and emotion of the performer through the music. Hybrid pianos are unique because they are fitted with a full-size replica of an acoustic piano keyboard action - it's just the sound that is reproduced digitally. This gives the best opportunity for a more realistic playing experience and it has been proven that Hybrid pianos such as the GP310 are preferred by most players over digital instruments with standard 'emulated' key actions. The GP310's triple-sensor keyboard action was developed by Casio in collaboration with Bechstein - the World-class German acoustic piano builder. Every detail of the key mechanism has been replicated in detail - including long wooden key length, balance pins, fulcrum, escapement, hammer weighting, and key return speed. The key action found in the GP310 competes with Hybrid pianos costing many thousands of pounds more. Players should find the transition from digital to acoustic pianos seamless with the Casio Natural Grand Hammer Action Keyboard, which makes it the ideal instrument for beginners and more experienced players alike. Just like many modern acoustic pianos, the white keytops are made of acrylic, whilst the black keys are constructed using Phenol. The response of the piano keyboard can be matched to suit your playing style with five different sensitivity settings.