Shenzhen lohas technology 61 keys Piano 61 keys Piano have 5 full scale 128 kinds of tone ' 100 kinds of rhythm 40 demo songs Midi input/ external speaker out Earphone jack/ DC adapter port Power supply: 4AA batteries or a 6 voltage DC adapter Control box size: 9.6 ( L) x 22.8 ( W) x 3.3 ( H) cm Keyboard: 88 ( L) x 17.4 ( W) x 0.5 ( H) cm single Packing: printed gift box size: 28( L) x19.8( W) x8.8( H) cm Qty: 24pcs/ Ctn CtnSize: 62( L) x58( W) x37.7( H) cm Piano weight: 1000 g N.W.: 31kg G.W.: 32kg