K780

Body size
Height: 158mm
Width: 380mm
Depth: 8mm (front), 22mm (rear)
Weight: 875g
Technical Specifications
Connection type
Logitech Unifying protocol (2.4GHz)
Bluetooth Smart Technology
Wireless communication range: >10m wireless operating range 1Wireless communication range may vary depending on the operating environment and computer conditions.
Optional Software
Logitech Options for Mac: OS 10.14 or later
Logitech Options for Windows: 10 or later
Logitech Flow
Indicator light (LED)
Bluetooth channel LEDx3
Battery level indicator
battery
Battery: 2 x AAA size dry cell batteries (included)
Battery: 24 months 2Mouse battery life may vary depending on usage
Special Keys
Hotkeys (home, search, back, app switching and context menu, etc.), Easy-Switch
Connection/Power: On/off switch
Key Life
Up to 10 million keystrokes
Tablet Covers and Stands
Compatible with most smartphones and tablets up to 11.3mm thick and can be placed vertically or horizontally; iPad Pro (12.9″) can be placed horizontally only.
Warranty Information
2-year free warranty
model number
K780

Information reference: https://www.logicool.co.jp/ja-jp/products/keyboards/k780-multi-device-wireless-keyboard.920-008033.html