?Bluetooth & 2.4G Wireless Connection?Bluetooth 4.2 technology provides a cable-free & clutter-free connection, operating distance 10m. Simply insert the nano USB receive into your computer or connect via bluetooth and use the keyboard instantly. ?Quick Switch to 3 Devices?: Fast channel switch between 3 devices without any interference or disconnection. No need to restart pairing process. This keyboard is perfect for people who work with several computer. Use this bluetooth keyboard and press Wireless/BT1/BT2 buttton to switch back and forth between them to save many time and cost. ?Universal Compatibility?Widely Compatible with Cellphone Tablet PC laptop Desktop with Android Windows iOS and Mac OS system. Works on Apple iPad Air, iPad 4 / 3 / 2, iPad Mini 4, iPhone, Galaxy Tab, Macbook, Surface pro & More ?Humanized Design for Smooth Typing?The ergonomic keycaps perferctly fit your finger, and produces low noise, comfortable touch feeling. Rubber Pads on back provide optimum comfort and securely keep the keyboard in place. Quite clicks also avoid bothering to others. Perfect for office and family use. ?Long Time Operation?Separate ON/OFF switch and Smart auto sleep feature design for power saving. Built-in 280mAh Rechargeable Li-ion Battery, 2 hours full charge, around 300 hours uninterrupted work, stand by for 45days.