Smart door locks are advanced security devices designed for residential, commercial, and industrial applications. They offer keyless entry through methods like fingerprint recognition, PIN codes, Bluetooth, Wi-Fi, or NFC. Many models feature remote access via smartphone apps, enabling users to lock/unlock doors, monitor access logs, and grant temporary permissions. Smart locks often integrate with home automation systems (e.g., Alexa, Google Home) and support auto-locking schedules. Popular products in this category include biometric deadbolts, keypad lever handles, retrofit smart lock kits, and high-security commercial-grade electronic locks. These devices prioritize durability, encryption standards (like AES-128), and tamper-proof designs while providing convenience and enhanced access control.