LEASUN (Black) 9 inch Ultrathin Bluetooth Wireless Keyboard for Android Tablet Samsung Galaxy Tab / Tab S / Tab pro, Samsung Galaxy Note, Google Nexus 7, Verizon Ellipsis, Nvidia Shield, Asus Memo Pad ME170CX / ME176CX / Asus MeMO Pad, and Other Android Devices Compatible with Android Tablet Samsung Galaxy Tab / Samsung Galaxy Note / Google Nexus 7 /Asus MeMO Pad / Other Android Devices/Android Phones Real "hard" laptop style keyboard with high end ABS material. A spring mechanism underneath each key ensures a tactile response with every stroke, helping you to type faster and with less error than on a touchscreen. Built-in rechargeable li-ion battery, charged through USB charging cable. Slim and portable, lighter and slimmer than other portable keyboard selling in the market Bluetooth Version: Bluetooth V3.0; Frequency: 2.4GHz; Working range: 10M; Size: (230mm*120mm*4.5mm).