1byone Ultra-Slim Wireless Bluetooth Keyboard with Built-in Multi-touch Touchpad and Rechargeable Battery for Android and Windows, Black Ultra Portability  Ultra slim and lightweight and compact design make it easy to storage your backpack or briefcase and take it anywhere for use. Build-in Touchpad  Perfect combination: QWERTY keyboard comes with a touchpad, which support multi-finger function will offer a great aid when you do not have a mouse in hand. Power Saving  500 mAh lithium battery. 90days standby time, Can work 90 hours continuously, less than 4 hours charging time. The keyboard will enter sleep mode when being idle for 30 minutes, press any key and wait for 3 seconds to reactivate it. Strong Bluetooth - High Speed Wireless Bluetooth 3.0 technology, which ensures your smooth remote control within 10 meters (33ft), beware that wireless range may vary depending on interference or the setup of your device. Compatibility  This keyboard is mainly compatible with Android and Windows. But you can also use it in most Bluetooth-enabled devices like phones, PC, tablet, laptop, smart TV etc. Please note that a 4.0 Bluetooth dongle (not provided) is needed if being used in PC/laptop/ another device device with no built-in bluetooth.