Features: Support for iOS / Android / Microsoft system, suitable for all types of smart phones and light weight smart tablets. All-aluminum alloy case, good hand feeling, beautiful and durable. Compact and convenient, the folding design reduces the width of the body to 55mm for easy carrying and storage. The 58-key standard keyboard keys are arranged to match the typing habits and support blind typing. Magnetic intelligent sensor switch, open the keyboard cover to open the keyboard power, close the keyboard cover to automatically enter the sleep mode. The shortcut key Fn C can turn on the Bluetooth, and click on the for iPad Bluetooth signal. Get rid of the old and complicated pairing, it is more convenient and faster. Specification: Combined Size: Approx. 22.6 x 5.6 x 1.6cm / 8.9 x 2.2 x 0.6in Expanded Size: Approx. 22.6 x 16.8 x 0.4cm / 8.9 x 6.6 x 0.2in Bare Metal Weight: Approx. 0.24kg Working Voltage: 3.2~4.2V Chip: Bluetooth Version 4.0 Battery Capacity: 210mAh Continuous Use Time: 100H (No Backlight) Standby Time: 110D Material: Plastic ABS+Aluminum Alloy Packing Size: Approx. 24.5 x 9.1 x 2.4cm / 9.6 x 3.6 x 0.9in Package List: Charging Cable x 1 Keyboard x 1 Instruction Manual x 1 1、Support for iOS / Android / Microsoft system, suitable for all types of smart phones and light weight smart tablets. 2、Compact and convenient, the folding design reduces the width of the body to 55mm for easy carrying and storage. 3、The 58-key standard keyboard keys are arranged to match the typing habits and support blind typing. 4、Magnetic intelligent sensor switch, open the keyboard cover to open the keyboard power, close the keyboard cover to automatically enter the sleep mode. 5、The shortcut key Fn C can turn on the Bluetooth, and click on the for iPad Bluetooth signal. Get rid of the old and complicated pairing, it is more convenient and faster.