... case ITEM :for ipad 2 cover with keyboard for ipad2 rotation case with bluetooth keyboard bluetooth keyboard with leather case bluetooth keyboard rotation ... meters 3, modulation system: FHSS 2.4G4, transmitting power: Class 2 5, operating voltage: 3.0-5.0 6, work current: <5.0MA ... days12, uninterrupted working time: 90 hours 13, charging time: 4-4.5 hours 14, Li-ion battery Capacity: Minimum 430MAH 15 ...