Bluetooth: - Type: Bluetooth 2.0 / 3.0 interface standard - Operating Distance: 10 meters Modulation System: GFSK Battery: - Built-in lithium battery - Battery Life: 3 years Operating Voltage: 3.0V ~ 5.0V Current: - Working: <5.0mA - Standby: 2.5mA - Sleeping: <200uA - Charging: 100mA key Life: 5 million strokes Key Number: 77 Attentions: - Keep the item away from sharp objects, oil, chemical or any other organic liquid. - Don"t place heavy object on top of the keyboard. - Don"t force or distort the keyboard. Note: The wireless keyboard can be connected to Samsung Galaxy Note 10.1", iPad, iPhone 4G, and iPod Touch that had installed iOS 1.0 or later. For other Bluetooth enabled device, please verify the Bluetooth standard and compatibility before attempting to connect to the keyboard. Operation Temperature: -10 Celsius degrees ~ 55 Celsius degrees Humidity: 20% ~ 50% Dimensions: 268mm x 190mm x 28mm Color: Black Package Include: 1 x Bluetooth Case Keyboard 1 x USB Power Charging Cable 1 x User Manual ePathDirect After Service: 30 Days Money Back Guarantee, 12 Months Warranty!