During a disaster like an earthquake or a wildfire, one of the first things that can disappear is cellphone service. But a Redmond-based company called Kymeta is making sure first responders can stay connected by developing a technology that could save lives. The device, called the Kymeta U8 Terminal, is about the size of two large pizza boxes stacked on top of each other and can be mounted to any car. It hooks up directly to the car battery and connects to satellites and cell towers to generate a Wi-Fi signal. It’s something the Redmond Police Department and areas of the U.S. Forest Service are already using in case of a major disaster. Kymeta provided a video that shows one of its devices mounted on a Redmond fire truck being tested in a citywide emergency response exercise called Operation Cascadia Rising.