How do I pair the M720 mouse to a device using Bluetooth?

Make sure your M720 is turned on, then press and hold the toggle button below the display for 3 seconds until the LED on the selected channel starts blinking fast. Open Bluetooth settings or Bluetooth device manager on your device and pair with 'M720 Triathlon Mouse'. Your device must support Bluetooth Smart, and is compatible with Windows 8 or later, Mac OS X 10.10 or later, and Android 5.0 or later. (Page 6)