Wireless Warnings You are here: Main Hardware Hardware Warnings Wireless Warnings Wireless Encryption and Security The NXFM100 wireless network uses WEP security with AES-128 protocol encryption to prevent unwanted packet sniffing. Wi-Fi Signal Strength The Fill-Rite app requires line-of-sight to the NXFM100 in order to communicate. The total wireless range of the NXFM100 is 150 feet.To ensure the best performance of the NXFM100, do not install the NXFM100 in a location where the signal can be blocked or degraded: