These are virtuosic studies, likely in a brilliant and showy style, that explore various technical challenges.
Requires solid technique for rapid passages and bravura display.
2 Paraphrasen (Op.277) is rated Henle level 6 of 9 — advanced repertoire, roughly ABRSM grades 7–8.
You should be comfortable at Henle level 6 — meaning you can already play level 5–6 pieces cleanly. Learning it one level early is possible as a stretch piece, but more than that usually leads to months of frustration.
A typical performance of 2 Paraphrasen (Op.277) lasts about 5 minutes.
2 Paraphrasen (Op.277) is available as free public-domain sheet music on IMSLP — the score is linked directly from this page.