Never used! This is made for iPads and comes with a nice little soft case that will hold the keyboard too! Includes recharging cable. Bought a few of these for all our devices. Fully rechargeable and Bluetooth is strong. We actually use another one of these for our Apple TV. Charge lasts days and days and has all the media keys too! Here is Joy's info on it. "The Arpeggio keyboard from The Joy Factory is the perfect companion for your iPad! Compact yet full-featured, Arpeggio is great for typing emails or notes and updating documents stored on your iPad. No wires or cables needed Arpeggio is Bluetooth Class 2 compatible. Use Arpeggio from up to 33 feet away from your iPad or device the comfortable keyboard and convenient special multimedia keys make it easy to key in anything from a distance. Its separate from your iPad, so you can position it any way you like and get comfortable. Arpeggio comes with a lithium ion polymer rechargeable battery for super fast charging. It goes to sleep if you don't use it for four minutes, so the battery lasts longer. "