Wide Application: The 4G LTE mobile hotspot router is a WiFi modem router. No broadband connection is needed; simply insert a 4G SIM card to connect to the 4G network. Its small and lightweight design makes it suitable for parties, travel, business trips, work, outdoor live streaming, gaming, car WiFi, etc. Multiple Device Connections: The 4G LTE WiFi mobile hotspot router can connect up to 10 devices simultaneously, supporting smartphones, tablets, laptops, and more. The effective WiFi range reaches 10 meters. One person can use it, and the whole family can share. Long Standby Time: Supports LTE CAT4 standard for high-speed internet access up to 150 Mbps, depending on signal strength. Features two standard SIM card slots and a fast 2100mAh battery. It lasts up to 10 hours on 4G LTE speeds and up to 240 hours of standby time before charging. It can also be powered externally with no time limit. Charging is possible via a computer's USB port, power bank, car USB charger, or power adapter. 4G Network Bands: The 4G LTE USB modem supports network bands: 4G: FDD LTE: B1 B3 B5 B7 B8 B20 (2600 1800 2100 900 850 800MHz) TDD LTE: B38 B40 B41 (2300 2600MHZ). It's a portable WIFI hotspot for travel. It's not plug and play; ensure your SIM card's band is compatible before purchasing. How to Use: Insert the SIM card and then install the battery (remove the insulation film). Even if your SIM card is compatible, the hotspot WIFI device may not be plug and play. You might need to disable the SIM card's PIN and modify the APN. Access the router's IP address (192.168.0.1), click on Network, then APN, enable it, and change the APN. Ensure the SIM card is active.