Whistle uses Wi-Fi and Bluetooth Low Energy (BLE) technology to sync the data collected by your device with your app. 

Wi-Fi syncs

When your device is within range of a saved Wi-Fi network (typically the network you connected to when you set up), it will sync every hour. Add more Wi-Fi networks to your device so your device can continue syncing as you move around with your pet.

Bluetooth Low Energy (BLE) syncs

Your Whistle device syncs with your phone when you open the app and are within BLE range (30 feet). To maintain battery life, these syncs are restricted to every 5 minutes.