2: Wireless Keyboard K520 Device path : /dev/hidraw5 WPID : 2011 Codename : K520 Kind : keyboard Protocol : HID++ 1.0 Polling rate : 20 ms (50Hz) Serial number: C17F6771 Firmware: 26.00.B0012 Other: 00.07 The power switch is located on the top case. Notifications: battery status (0x100000). Battery: full, discharging. Has Swap Fn register