HP Princeton HP-21 - Manual (Page 18)

Specifications
Keyboard
Voice
Demo Song
Display
Switch and Buttons
Transpose
Pedals
Touch Response
Connectors
Speaker
Dimension
Weight
88 hammer action keys
10 Voices
20 Demo Songs
LED
POWER SWITCH, VOLUME SWITCH, DUAL, DSP,
TOUCH, RECORD, TRACK A, TRACK B, REPEAT,
METRONOME, TRANSPOSE +/-, TEMPO +/-,
DEMO ALL, RECORD - PLAY/STOP, DEMO - SELECT/
START/STOP, VOICE SELECT 0-9
+/-12 semi tones
Soft, Sostenuto, Sustain
Hard, Medium, Soft, Off
AC POWER, HEADPHONES, AUX.OUT, MIDI IN/OUT,
PEDALS
8ohm 25w x 2
54” x 20” x 33”
136 Lbs