This smart door lock with knob integrates multiple access methods into a single, compact unit designed for front door use. The device combines a capacitive fingerprint sensor, a touchscreen numeric keypad, and a traditional key override, offering flexibility for different user preferences.

Constructed from die-cast zinc alloy and reinforced stainless steel, the exterior components resist corrosion and physical impact, contributing to long-term reliability in various weather conditions. The internal motor and control board are housed in a sealed compartment to minimize dust and moisture intrusion, supporting stable operation over extended periods. The fingerprint module uses semiconductor technology to scan and recognize enrolled fingerprints with consistent accuracy. It can store up to 50 unique fingerprints, allowing family members or frequent users to gain access without physical keys. The touchscreen keypad responds to light touches and provides illuminated digits for use in low-light environments. A temporary passcode function supports guest access or service entry, with codes that can be set to expire after a single use or within a chosen time window. The lock also emits an audible beep and visual indicator to confirm successful unlocking or to signal low battery warnings. Installation requires only basic tools and fits standard US door preparations, with adjustable backset and latch to accommodate most residential doors. The knob design allows straightforward operation from either side, and the interior assembly includes a simple turn-to-lock mechanism. Power is supplied by four AA batteries, which typically provide several months of use under normal conditions. The low-battery alarm alerts the user well in advance, and the physical key slot serves as a failsafe in case of complete power depletion. No Wi-Fi or Bluetooth connectivity is included, keeping the device offline and reducing potential security vulnerabilities associated with networked locks. The affordable price point positions this lock as a value-oriented option for homeowners or tenants who want keyless convenience without a significant investment. The absence of smart home integration makes it suitable for those who prefer a straightforward, standalone lock that does not rely on internet connectivity or mobile app management.

The LinkThai smart door lock with knob delivers reliable entry control with an emphasis on ease of use and durable construction, meeting everyday needs for secure, keyless access.