for ipad 2 cover with keyboard 1)PCB circuit board,2mm thickness 2)BRCM chip 3)bluetooth keyboard with rotation leather case ITEM :for ipad 2 cover with keyboard for ipad2 ... , executive standard: Bluetooth V2.0 2 Working distance: 10 meters 3, modulation system: FHSS 2.4G4, transmitting power: Class 2 5, operating voltage: 3 ...