The Logitech keyboard does away with any need for batteries. This solar wireless keyboard is powered by any indoor, outdoor, low light, or lamp light, and when fully charged, it will work for three months even in darkness. The Logitech K760 is a great match for Apple devices, working with Mac, iPad, and iPhone. The Logitech keyboard has an easy Bluetooth connection to allow for changing from Mac to iPhone with just the push of a button. The solar wireless keyboard features a reliable connection from up to 30 feet. With the PVC-free construction of the Logitech K760 keyboard, the product is green compliant, coming with a seal of approval for environmental friendliness. The concave key design offers fast, quiet typing, and it is the right size for convenient portability. The Logitech keyboard has a height of 1.46 inches, width of 12.20 inches, and depth of 6.65 inches.