Features: brand new and high quality US Bluetooth-compatible 5.1 Chipset :Lowlatency and stable performance, high quality keyboard. Ultra Big Touchpad with Left&Right Click :Maximumly approach the user experience of laptop touchpad. 3 Channel Bluetooth-compatible Connection:3 bluetooth-compatible device can connect with the folding keyboard and switch between each other randomly. Big Size Keycap&Scissors Switch: 1:1keycap size &layout as laptop and comfortable scissors switch. Rechargeable Lithium Battery : Build in 210mAh big capacity rechargeable lithium battery,long standby for time and environment friendly. Multi Systems Compatible : for Windows,Android,IOS(Desk,lock for key can not use),fully satisfy your of input requirement. Textured PU Leather Back Cover: Nice hand feeling and business style. Tri-Folding Keyboard : Combine the nice input user experience of standard size keyboard and portable mini size advantage into one keyboard. Specifications: Chipset: US bluetooth-compatible 5.1 Connnection Channel Quantity: 3 channel Materials:ABS Keyboard Size:(approx.) 346.86x106.09x8.8mm/13.66x4.18x0.35in (open) 187x106.09x17.8mm/7.36x4.18x0.70in (folding) Touchpad Size: approx. 92.1x67.46mm/3.63x2.66in Working Voltage:3.7V Working Current of Touchpad: