We all know that wireless technology means the absence of cables and wires for data transfer. The “Fi” part of Wi-Fi is short for “fidelity,” meaning lasting support. MimiGreen is an approved vendor of Fi-compatible dog collars. TryFi is a company that builds tech for dogs. Fi is the first tracking collar to use the LTE-M low-power, long-distance cellular network. This means you can track your dog over greater distances with many devices.