TG Roll-up Portable Flexible Bluetooth Keyboard (72-5514) Features Include: High Quality Silicon Construction Lightweight and Compact Roll Up for Easy Transport Bluetooth ConnectivityWater Resistant, Spill Proof and Washable Surface 85 KeysDimensions: 5.5 x 13.5 x .375 inches Tech Specs: Bluetooth Version: 2.0 Standby Time: Up to 90 Hours Working Range: Up to 33 Feet Lithium Battery Capacity: 250 mAHCharging Time: 5 HoursBattery Life: Up to 3 YearsWorking Time: Up to 5 Hours Compatible With: iPad, iPhone* Nokia Symbian S60 (V3.0 or Later) OS Sony Playstation 3Bluetooth Compatible Computers with Windows or Mac OS 2.0