I was alerted to its existence under the Yamano brand, but the people who sent me one to play with are Hecsan Incorporated who, y'know, have a Web site in English, and everything.

The Hecsan Rollup Piano looks like exactly the same product as an earlier model Yamano, but the only difference is the electronics module on the end. That looks a bit funkier on the newer Yamano but, as we'll see, it probably doesn't matter very much. The big deal about these things is the keyboard.

It's made of rubber.

Relevant Parameters :piano  EP-K49D" />

1,pucker punction of electronic keyboard
2,49 standard keys
3,6 Demonstration songs
4,16 tone colors
5,10 rhythms
6,8 drum sets
7,Single Finger Chords/Fingered Chords/Fill-in
8,one key one note
9,Record /Playback
10,16-stage volume adjustable
11,32-stage tempo speed
12,External phone output
13,External DC input
14,Automatic shutdown function

piano  EP-K49D" />

 Number of key: 49keys
Timbres: 16
Demo Songs: 6
Rhythms: 10
Percussions: 8
Chord: single finger/fingered chords
Output Power: >=0.5W
Rated Voltage: DC4 

 Detailed Product Description

made of silicone ,green , foldable ,protable,waterproof,dustproof,easy to carrier ,anytime and anywhere you can play

 

Standard 49 Keys,6 Demo Songs,16 tone colors,10 rhythms,8 drum sets,Hotkey REC&Replay function,Single Finger Chords/Fingered Chords/Fill-in,16-stage volume adjustable,32-stage tempo speed,

    Dimension: keyboard 725*172*4mm,                                                                 console 92x213x27mmN.W.:820g4.Automatic shutdown function                                                                                         5.100% waterproof3.External DC input2.External phone output1.pucker function of electronic keyboard

The flat keys use a simple, and I think decently durable, rubber membrane design.

There's a depression around the edge of each key, so you can feel where you are without looking, but that's about all the ergonomic joy you're going to get out of this thing. There's almost no "click" when you press a key, and they of course barely move at all under your fingers.

The contact area is large, though; you can get a note when you press right up to the edges of all of the keys, and all of their length works, too, except for the very last half-inch or so. Your fingers shouldn't be going there anyway.

This sort of keyboard is not, actually, new. Membrane buttons of one kind or another feature on umpteen household appliances, of course, but they've also been used on some previous classic musical instruments. Those membrane 'boards are all mini hunt-and-peck synth controllers, though, kin to plastic button 'boards and certain cult toys. Full sized membrane keyboards are a definite rarity. There's the Rollup Piano, and I suppose that cardboard piano qualifies as well, but that's about it, as far as I know.