Bluetooth 5.1 Chipset-Low latency and stable performance,an assurance 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&Scissors Switch -1:1keycap size &layout as laptop and comfortable scissors switch.Rechargeable Lithium Battery -Build in 140mAh big capacity rechargeable lithium battery,long standby time and environment friendly.Multi System Compatible -Compatible with Windows,Android,for IOS,fully satisfy your of input requirement. Tri Folding Keyboard -Combine the nice input user experience of standard size keyboard and portable mini size advantage into one keyboard.Chipset:Broadcom US bluetooth 5.1Connnection Channel Quantity: 3 channelsTouchpad Size:92.1 x 67.46mmWorking Voltage:3.7VWorking Current of Touchpad:Less than 10mAStandby Current:Less than 1mAWorking Currecnt of Key:Less than 4mASleeping Currecnt:17uASleeping Time:10 minutesWorking Distance:10mLithium Battery Capacity:140mAhWake Up Method:Press any keyApplication:Windows/for IOS/AndroidType:Bluetooth Wireless KeyboardApplication:Desktop,Laptop,Number,TabletKeyboard Standard:Tablet KeyboardStyle:Standard,Slim,Ergonomics,Folding,Multimedia,Gaming,Mini,For Laptop,for Tablet,Multifunctional Keyboard,Projection KeyboardInterface Type:Bluetooth/USBTransmission: Bluetooth 5.1Style:Tri Folding Keyboardcolor:BlackMaterial:ABSsize:Folded 152 x 98.12 x 19.83mm, unfolded 304.31 x 98.12 x 9.86mmPackage Contents:1 x folding Wireless Bluetooth keyboard1 x Charging CableOnly 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.