ST-BRK9500BC：For 7"~8" tablet PC, Single keyboard size: 200*125*4mm, N.W: 260g. Keyboard with leather case size:21.3*15.3*3CM   N.W: 310g 3 IN 1 systems - Android, Windows, IOS Material: ABS+Metal Scissors keys, react, typing quickly KB top cover brushed finish KB with UV coating to avoid erasing High quality leather case with elastic band Black or Pink   ST-BRK9500BC：For 9"~10.1" tablets Bluetooth 3.0 version 3 IN 1 system- Android, Windows. IOS