Smart Door Lock (Fingerprint + PIN + App)
Keyless entry lock with capacitive fingerprint sensor, PIN keypad, Bluetooth app control, and mechanical key backup. Fits standard 38–68mm doors. CE/FCC certified.
What to Check When Sourcing
Smart locks are both a security product and an IoT device — they have mechanical failure modes, firmware vulnerabilities, and regulatory requirements for each target market.
Fingerprint sensor technology. Capacitive sensors (required) vs. optical sensors: optical sensors can be fooled by a high-quality photograph of a fingerprint. For any application where security matters, insist on capacitive semiconductor sensors. Verify the sensor module brand (IDEX, Goodix, or equivalent).
ANSI/BHMA Grade 2 or Grade 1. For the US market, commercial buyers and rental property managers expect ANSI/BHMA Grade 2 (residential) or Grade 1 (commercial) ratings — these test cycle life (250,000 vs. 500,000 cycles), bolt strength, and forced entry resistance. Grade 1 certification from an accredited lab is required for most commercial applications.
API and smart home integration. For private-label products, verify what smart home protocols are supported — Zigbee, Z-Wave, or a proprietary WiFi app. Z-Wave (Sub-GHz) has better wall penetration than 2.4GHz WiFi and lower false-unlock rates. Confirm whether you get firmware source access for ongoing app support.
Common Issues
Battery warning at low voltage — Some locks only alert the user when the battery is already critically low, giving insufficient time to replace before lockout. Verify the low-battery warning threshold in firmware.
Latch bolt alignment sensitivity — Cheap deadbolt mechanisms have tight alignment tolerances and fail when the door frame shifts seasonally. Test sample units with deliberate misalignment of 2mm in each direction.
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