The high level of compatible devices suggests that you'll use this keyboard for many Bluetooth-enabled devices. Windows, Android and for iOS are compatible with keyboard. If you your phone or if you change your laptop/tablet, you'll simply keep using the same keyboard. [ Great for Trip and Normal use ] - Foldable, when folded, it will become small and portable, you will put it in easy. take it everywhere in your trips. convenient. and you can also use it as normal keyboard, good type . [ Rechargeable Battery ] - Users pleasure from up to 40 hours of writing time with only one charge. The Wireless Folding has a rechargeable lithium- battery. Standby time is up to 90 . Bluetooth transmission distance upto 10m Working voltage: 3.3~4.2V Battery: rechargable 140mAh lithium battery Compatible system: Windows/Android/for IOS Type:Bluetooth Wireless Application:Desktop,Laptop,Number,Tablet Keyboard Standard:Mini Keyboard Style:Standard,Mini Interface Type:USB,Bluetooth color:Silver Material:ABS+Metal size: folded 152 x 91 x 22mm, unfolded 315 x 91 x 11mm Package Contents: 1 x folding Wireless 1 x Charging Cable Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.