Authentic piano sound and response in a portable and compact design The P-45 features a Graded Hammer Standard (GHS) keyboard. The feel of the keyboard gradually changes according to the register, so that it feels heavier when playing bass parts and lighter when playing treble parts, just like an acoustic piano. The keyboard has a responsive, natural feel together with matte finish black keys for a truly authentic piano playing experience. Specs Size/Weight Dimensions Width : 1326mm Height : 154mm Depth : 295mm Weight : 11.5kg Control Interface Keyboard Number of Keys : 88 Type : Graded hammer standard (GHS) keyboard Touch Sensitivity : Hard/medium/soft/fixed Language : English Voices Tone Generation Piano Sound : AMW Stereo Sampling Number of Polyphony (Max.) : 64 Number of Voices : 10 Effects Reverb : Yes (four types) Dual/Layers : Yes Duo : Yes Functions Metronome : Yes Tempo Range : 32 - 280 Transpose : -6 to 0,0 to 6 Tuning : 414.8 - 440.0 - 446.8 Hz Storage and Connectivity Connectivity : DC IN DC IN 12 V Headphones : Standard Sustain Pedal : Yes (Half pedal available with optional FC3A) Pedal Unit : No MIDI : No AUX OUT : No USB TO HOST : Yes Amplifiers and Speakers Amplifiers : 6 W x 2 Speakers : 12 cm x 2 Power Supply Power Supply : PA-150B or other Yamaha-preferred parts Power Consumption : 6 W (using PA-150 power adapter) Auto Power Off Function : Yes Accessories Included Accessories : Music Rest Yes Pedal/Footswitch : Yes AC Adaptor : PA-150B or other Yamaha-preferred parts