1. Download the Whistle app on your smartphone to begin setup. 
  2. Follow the step-by-step instructions in the app for setup. Whistle FIT will need to connect to a Wi-Fi network, so we recommend you set up at home.
  3. Follow the step-by-step instructions in the app for setup. Whistle FIT will need to connect to a Wi-Fi network, so we recommend you set up at home. 
  4. Let your Whistle charge. Once the LED light on Whistle FIT is green, you’ll know that it’s charged. We’ll send you a notification on your phone when it’s time to attach the device to your pet.
  5. To attach Whistle FIT to your pet’s collar, first remove the black strap by pulling up and down. Then take your device and collar strap and place your pet's collar in between the two, so that the device can latch onto either side of the collar strap.