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 modify 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. very convenient. and you can also use it as normal keyboard, very good type . [ Rechargeable Battery ] - Users get pleasure from up to 40 hours of writing time with only one charge. The Wireless Folding Bluetooth Keyboard has a rechargeable lithium-ion battery. Standby time is up to 90 . Bluetooth transmission distance 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:Black Material:ABS+Metal size: folded 152 x 91 x 22mm, unfolded 315 x 91 x 11mm Package Contents: 1 x folding Wireless Bluetooth keyboard 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 picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.