The PS-300 is a home keyboard with digital tone generation. The Yamaha PS-400 is an upgraded version with more sounds.
Year Released: 1982
Keyboard: 37 keys
ROM: 8 sounds, 10 rhythms
Effects: sustain, delayed vibrato
Power Consumption: 2.3 watts
Dimensions: 543 mm x 152 mm x 43 mm
Weight: 1.4 kg excluding batteries
This keyboard has built-in 1.4-watt mono speaker(s).
Batteries: C x 6
YAMAHA PSR-EW300 BLACK ($249.99)
Yamaha PSR-EW300 Keyboard ($315.59)