[Boardcom US Bluetooth 5.1 Chipset]-Low latency and stable performance,an assurance for high quality keyboard. [Ultra Big Touchpad with Click]-Maximumly approach the user experience of laptop touchpad. [3 Channels Bluetooth Connection]-3 bluetooth 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 time and environment friendly. [Multi System Compatible]-Compatible with Windows,Android,IOS and (Desk,lock key can not use),fully satisfy your of input requirement. [Textured PU Leather Back Cover]-Nice hand feeling and business style. [ Folding Keyboard] -Combine the nice input user experience of standard size keyboard and portable mini size advantage into one keyboard. Language Version:English/Russian/Brazil Portuguese Chipset:Broadcom US bluetooth 5.1 Connnection Channel Quantity:3 channels Weight:227g Working Voltage:3.7V Working Current of Touchpad:Less than 10mA Standby Current:Less than 1mA Working Currecnt of Key:Less than 4mA Sleeping Currecnt:17uA Sleeping Time:10 minutes Working Distance:10m Lithium Battery Capacity:210mAh Wake Up :Press any key Application:Windows/IOS/Android/ Colour:Black Material:plastic Size: Keyboard Size:346.86X106.09X8.8mm(open),187X106.09X17.8mm(folding) Touchpad Size:92.1x67.46mm Package Contents: 1 * Wireless Folding Keyboard Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.