Quick overview from the supplier:
Logitech Wireless Combo MX Keys Advanced for Business | Gen 2, MX Keys for Business,MX Master 3S for Business and MX Palm Rest, Logi Bolt USB Receiver, Bluetooth Low Energy (BLE): 5.0+, Keyboard: USB-C rechargeable Li-Po (1500 mAh), Mouse Li-Po (500 mAh), Graphite, US
