[ Boardcom US Bluetooth 5.1 Chipset ]- Low latency and stable performance,an aurance for high quality keyboard. [ Ultra Big Touchpad with Left&Right 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&Sciors Switch ] - 1:1keycap size &layout as laptop and comfortable sciors 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 Mac(Desk,lock key can not use),fully satisfy your of input requirement. [ Textured PU Leather Back Cover ] - Nice hand feeling and busine style. [ Tri Folding Keyboard ] - Combine the nice input user experience of standard size keyboard and portable mini size advantage into one keyboard. SPECIFICATION -- Chipset:Broadcom US bluetooth 5.1 -- Connnection Channel Quantity: 3 channel -- Materials:ABS -- Keyboard Size:346.86X106.09X8.8mm(open) 187X106.09X17.8mm(folding) -- Touchpad Size:92.1*67.46mm -- Weight:227g -- Working Voltage:3.7V -- Working Current of Touchpad:<10mA -- Standby Current:<1mA -- Working Currecnt of Key:<4mA -- Sleeping Currecnt:17uA -- Sleeping Time:10 minute -- Working Distance:10m -- Lithium Battery Capacity:210mAh -- Wake Up Method:Pre any key -- Application:Windows/IOS/Android/Mac