Vetrax® works anywhere, so long as the sensor is charged; data will not be transferred, however, unless the sensor is able to connect to a Wi-Fi network. If you are away from home for an extended time, or if your pet is otherwise out of range of a wireless network, the sensor can store up to seven days of continuous activity before needing to offload its data. This action will be automatically performed when the sensor detects that it is within range of a network it has permission to access.