> For the complete documentation index, see [llms.txt](https://indoor.router.works/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://indoor.router.works/ezr23/introduction.md).

# Introduction

The indoor router has a built-in 4G LTE mobile modem and MIMO Wi-Fi booster. It uses Nano-SIM cards to connect to mobile networks and then provides an Internet connection on its Wi-Fi hotspot and LAN Ethernet connection.

<figure><img src="https://758914960-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-LvFmeL2Pv0EF2-7nON9%2F-M51Aw4PGREtjqZ9t4Kd%2F-M51C7QRgXiyXGzY-bnR%2FEZR23-4G-Router_Working-Principle.jpg?alt=media&#x26;token=675d5079-4b77-4208-91bf-f0cb6cf44c63" alt=""><figcaption><p>4G Router Working Principle</p></figcaption></figure>

The indoor 4G router has a powerful 27dBm 2.4GHz Wi-Fi booster inside with transmission speeds of up to 300Mbps. The Wi-Fi signal can cover 100-200 yards in radius in the open space.

Include innovative high-gain paddle 4G antennas. It is ideal for providing internet in homes, offices, shops, restaurants, caravans, and industrial applications.