Specifiction : Material : ABS plastic System :MacOS,Android,Windows Key quantity :108 key Bluetooth-compita solution :American Broadcom (BCM20730A2) Bluetooth-compita version :Bluetooth-compita 3.0 Keyboard life (the number of key-prees) 5 million times The response speed of the 5 ms Wirele/Bluetooth-compita transmiion distance 10 m Working current/voltage 2mA/3.7V Built-in lithium-ion battery is Battery Type capacity polymer soft lithium battery 300mAh Charging time: 2 hours Time 150 hours Standby time is 2 months Conventional color iron-gray Features : MULTI DEVICE SYNC- This Bluetooth-compita keyboard has 3 Bluetooth-compita options, supporting up to 3 devices simultaneously and you can easily switch between them by a slight pre.Perfect for those needing to operate multiple devices. RECHARGEABLE CONVENIENCE- This keyboard is rechargeable through provided Micro-USB cable and will last up to 2 months with a single charge(based on daily use).The ON/OFF switch botton on keyboard also helps reserve the power. EASY PAIRING &- 4 independent pairing channels,pairing proce is simple and easy.It works well with Windows, iOS, Android and Mac operating systems. Compatible with iPad Pro, iPad Air, iPad mini, iPhone X, iPhone 8, 7, 6S, Galaxy Tab, Android tablets and more. SCISSOR-SWITCH KEYS- This keyboard is made of durable ABS material in the front and premium aluminum in back, gives it a solid look. The scior switch design with soft keys delivers a incredibly comfortable typing experience Note : The language keyboard is just print the Language letter under the English letter , so when you make order for the Language keyboard , hope you can confirm it with our service first ! The last but not least , if you have any problem about the package or the product , hope you can