【100% SATISFACTION GUARANTEE】We promise every customer 100% shopping satisfaction. If you have any questions about your purchase, please contact us at any time. If you are not satisfied with the mobile WiFi router, please let us know immediately so we can refund you in full. If you have any questions, please contact our customer service. 【4G WIFI HOTSPOT & HIGH SPEED】The WiFi travel router does not require a broadband connection, just a 3G 4G SIM card to connect to a 5G network. It provides extremely fast internet speed for your device even when there is no 5G network. Effective distance: 10m. 【HOW TO USE】Insert the SIM card and install the battery. Even if your SIM card is compatible with the WiFi hotspot device, it may not be plug and play. You may need to disable the SIM card's PIN code and change the APN. It supports network bands b1/2/3/5/7/8/20/40. The mobile WiFi hotspot can connect up to 10 devices simultaneously and supports smartphones, tablets, laptops, etc. 【MAIN FEATURES】The 4G LTE mobile WiFi hotspot has a SIM card slot and a 2100mAh battery. It can be powered by an external power supply, with no time limit. It can be charged via a USB port on a computer, a USB car charger, or a power adapter. 【APPLICABLE SCENARIOS】The 4G LTE USB WiFi modem is small and lightweight, suitable for parties, travel, business trips, work, outdoor live streaming, gaming, car WiFi, etc.