KuWFi portable WiFi, also known as a MiFi device or 4G LTE router. Function: Works as a portable router providing wireless internet (Wi-Fi) to other devices (like phones, laptops, tablets) by using a SIM card to access the 4G LTE network. Features: Features a display screen showing the device status (like signal strength, battery level, and SIM card status) and has an internal 5400 battery allowing for mobile use.