A digital piano is easier to move than a [real] piano.
Tips
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Colloquial short form of 电钢琴, very common in musician circles and online shopping (Taobao product listings, music-equipment forums). In formal writing stick with 电钢琴.
mistakes
Don't confuse with the general word 钢 (gāng, 'steel'). The short form relies on context — 买电钢 means 'buy a digital piano', not 'buy steel'.
