A door lock from the startup Latch, connected via Bluetooth and a smartphone app. The advent of this smart door lock provides a safer protection for apartment and business users. In addition to using the key to unlock, the user can also use the NFC smart card or enter the unlock code on the keyboard of the door lock.

This door lock has a built-in wide-angle camera, and every time someone uses the lock, the wide-angle camera shoots once. This smart door lock smart support replaces doorbell music through the APP network. The letter M in the name of this smart door lock stands for "blinking", which is a cylinder with a recessed design pin that separates the latch. Most smart door locks do not have this design, making this smart door lock more popular with commercial users and apartment building users.

This smart door lock is not directly available to consumers, but is sold to the building owner at a price of $399 for a single price of 10, and provides a two-year warranty.