> For the complete documentation index, see [llms.txt](https://docs.ifreeq.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.ifreeq.com/faqs/smart-product-solution/lock/nb-iot-lock.md). # NB-IoT Lock ## What are the advantages and disadvantages of Tuya plug-and-play NB-IoT smart door locks? The power consumption is low, but the network delay is high. ## Which customers does a plug-and-play NB-IoT smart door lock apply to? 1\. Users or groups who want to upgrade and rebuild smart door locks for new, second-handed, and rented houses to meet their security, convenience, and permission sharing requirements 2\. Product requirements of China's three major operators, operators outside China, and hotel and apartment industry customers in and outside China ## What are the advantages of NB-IoT smart door locks? 1\. Simplified configurations: NB-IoT smart door locks are easy to install and maintain. No gateway configuration or network pairing is required. The door locks can automatically connect to a network and can be used out of the box. 2\. Ultra-low power consumption: In NB-IoT PSM mode, the static current of an NB-IoT smart door lock is 50 mA. 3\. Large number of connections: The operator's network is stable and reliable. Theoretically, a base station can connect to 600,000 devices. 4\. Wide coverage: NB-IoT improves the gain by 20 dBm when compared with 2G and is applicable to parking lots and basements. 5\. Time synchronization: The NB-IoT module is embedded with the RTC function. ## What are the application scenarios of Tuya plug-and-play NB-IoT smart door locks? It can be used in houses and apartments in China. ## What is the battery life of a Tuya plug-and-play NB-IoT door lock? 12 months in general. --- # Agent Instructions This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com. ## Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter: ``` GET https://docs.ifreeq.com/faqs/smart-product-solution/lock/nb-iot-lock.md?ask=&goal= ``` `ask` is the immediate question: it should be specific, self-contained, and written in natural language. `goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.