Casio GP-310 Celviano Grand Hybrid Digital Piano (Black)The Casio GP310BK grand hybrid piano's astute combination of innovative and traditional elements raises the bar for today's hybrid pianos Designed in collaboration with renowned acoustic piano maker C. Bechstein, Casio's Celviano Grand Hybrid GP 310's astute combination of innovative and traditional elements raises the bar for today's hybrid pianos. The moment your fingers alight on the keys, you'll feel and hear the GP 310 Grand Hybrid's definitive