Xiaomi has once again raised the bar for smart home innovation with the launch of the Xiaomi M40 Pro Smart Door Lock, a next-generation security solution designed for modern households. Introduced in the Chinese market, the M40 Pro combines cutting-edge artificial intelligence, biometric precision, and deep ecosystem integration through Xiaomi’s HyperOS. With advanced technologies such as AI palm vein recognition, 3D structured-light facial identification, and a 5-inch HD display, this smart lock aims to deliver not just security but also convenience, style, and intelligent automation.
The standout feature of the Xiaomi M40 Pro is its AI palm vein recognition system, which uses near-infrared light to scan subcutaneous vein patterns for secure, contactless entry. This technology ensures high accuracy and eliminates the risk of unauthorized access through photographs or fingerprints. The 3D structured-light facial recognition meets BCTC financial-grade standards, offering precise detection with built-in liveness verification to prevent spoofing.
Xiaomi has equipped the M40 Pro with a self-learning fingerprint sensor that improves recognition accuracy over time. The lock supports 12 unlocking methods, including palm vein, facial recognition, fingerprint, Bluetooth, NFC, passcodes, Mi Home remote unlock, and even physical keys. This flexibility ensures that every member of the household can access the door conveniently while maintaining top-level security.
For real-time monitoring, the M40 Pro features a dual-camera panoramic peephole—a 3MP main sensor with a 175° view and a 2MP auxiliary lens offering 128°, together covering a 190° field of vision. The AI-driven camera system can detect people, packages, and unusual movements, sending instant alerts to your phone.
Inside, a 5-inch HD display provides a live view of the external camera feed, which can also be streamed to Xiaomi TVs, smartphones, and even the Xiaomi SU7 car. This deep integration within Xiaomi’s HyperOS ecosystem allows for seamless smart home automation — such as turning on lights, adjusting climate settings, or activating surveillance systems upon unlocking the door.
The M40 Pro includes a dual power system with an 8000mAh rechargeable lithium battery lasting up to 4.5 months, plus four AA batteries as backup for an additional 6 months. For emergencies, both internal and external Type-C ports allow quick recharging, and it even supports reverse wireless charging from compatible smartphones.
At its core, the M40 Pro employs a C-grade direct-insert lock cylinder with a through-body structure that enhances resistance to forced entry. Sensors continuously monitor door status—whether it’s left ajar, forcibly opened, or improperly locked. The lock is crafted in a brushed metal finish that combines aesthetic appeal with robust construction.
Supporting Wi-Fi 6, Bluetooth 5.3, and NFC, the M40 Pro ensures reliable and fast communication with Xiaomi’s Mi Home app. Users receive alerts for low battery, tampering, or abnormal temperature, while WeChat integration allows for video and voice intercom to communicate with visitors directly from a smartphone.
The Xiaomi M40 Pro Smart Door Lock is currently available for pre-order at 3,229.15 yuan (approximately $453). Once officially launched, the retail price will be 3,799 yuan (around $533). Given its premium design and feature set, the pricing is competitive for the smart lock segment, especially when compared to other AI-powered security products.
In real-world use, the Xiaomi M40 Pro delivers a seamless experience that blends convenience and reliability. The palm vein recognition works instantly and accurately, even in dim lighting, while the 3D facial recognition offers swift authentication without physical contact. The built-in camera system and wide-angle peephole ensure homeowners can monitor entryways with exceptional clarity.
The integration with HyperOS is a major highlight — unlocking the door can trigger multiple home automation sequences, such as welcoming lights and indoor temperature adjustments. Battery performance is impressive, and the backup system provides peace of mind during power outages. The lock’s sturdy build quality and tamper detection make it feel trustworthy and well-engineered.
However, since it’s currently tailored to the Chinese market, some features like WeChat intercom and Xiaomi ecosystem automation may require regional compatibility for global users.
If you’re looking for a premium smart lock that combines top-tier AI security with smart home integration, the Xiaomi M40 Pro is an excellent choice. It’s ideal for homeowners who already use Xiaomi’s ecosystem and value cutting-edge biometric authentication. For those outside China, compatibility might be a temporary limitation, but as Xiaomi expands global support, this device stands out as a forward-looking investment.
The Xiaomi M40 Pro Smart Door Lock redefines what a modern smart lock can be. With its fusion of AI-powered palm vein recognition, 3D face scanning, intelligent automation, and solid construction, it sets a new benchmark in home security technology. Though it carries a premium price tag, the M40 Pro justifies it through innovation, functionality, and future-ready integration — making it a smart, secure, and stylish choice for the modern connected home.
Q1: What are the main features of the Xiaomi M40 Pro Smart Door Lock?
The M40 Pro features AI palm vein recognition, 3D facial unlock, fingerprint access, 12 unlock methods, a 5-inch display, dual cameras, and HyperOS smart integration.
Q2: How does the palm vein recognition system work?
It uses near-infrared light to scan subcutaneous vein patterns for contactless and highly secure access, ensuring precise identification every time.
Q3: What is the battery life of the Xiaomi M40 Pro Smart Door Lock?
It runs on an 8000mAh rechargeable battery lasting up to 4.5 months, with four AA batteries as backup for an additional 6 months.
Q4: What is the price of the Xiaomi M40 Pro Smart Door Lock?
The smart lock is priced at 3,229.15 yuan ($453) during pre-order and 3,799 yuan ($533) at its official retail price.
Q5: Is the Xiaomi M40 Pro Smart Door Lock available globally?
Currently, it’s launched in China. Some features like WeChat intercom and HyperOS integration may require regional support for global users.
Via: (Source - JD)
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