Latch M2 operation

The Latch M2 supports four ways to unlock your door: the DOOR app, a doorcode, a Latch Keycard, and a mechanical key. This article walks through day-to-day use.

Unlocking with the DOOR app

Approach the door with your phone — make sure Bluetooth is enabled
Open the DOOR app and tap the door tile, or use the iOS Lock Screen widget / Android widget if you have one set up
Tap Unlock — the Lens lights up and the lever hub engages
Turn the exterior lever to open the door

The lever engagement window lasts a few seconds — if you don't open the door in time, tap Unlock again.

Unlocking with a doorcode

Tap any key on the Lens to wake it — the keypad lights up
Enter your numeric doorcode
The Lens spins to confirm — the lever hub engages for approximately 10 seconds
Turn the exterior lever to open the door before the window closes

If the Lens flashes instead of spinning, the code wasn't accepted. Try again, and check that you're entering the right code for this door.

Unlocking with a Latch Keycard

Tap any key on the Lens to wake it
Hold your Latch Keycard flat against the center of the Lens
The Lens spins — the lever hub engages for approximately 10 seconds
Turn the exterior lever to open the door before the window closes

NFC range is very short — the Keycard must be in direct contact with the Lens.

Using the mechanical key

The Latch M2 includes a key cylinder on the exterior of the device. The mechanical key works at any time, independent of the app, batteries, or any credential — it is the most reliable backup if the device stops responding electronically.

Insert the key into the cylinder
Rotate one direction to retract the latchbolt — you can also turn the lever and pull the door open
Rotate the other direction to throw or retract the deadbolt

Store the mechanical key somewhere accessible but secure — your property manager can clarify how keys are issued at your property.

Locking the door

The exterior lever is locked from outside at all times. After a successful unlock, the lever hub disengages automatically when the ~10-second credential window closes — no action is needed to re-lock the lever.

The deadbolt does not throw automatically. To extend the deadbolt:

From inside: turn the interior thumbturn — the interior lever and thumbturn are always free, no credential needed
From outside: use the mechanical key

Confirm the locking practice with your property manager — some properties require residents to throw the deadbolt when leaving.

Lens indicators at a glance

Lens spins: credential accepted — the lever is engaged, turn it to open the door
Lens flashes: credential not accepted — try again, check the right code is being entered
Lens is dark: the device is asleep — tap any key to wake it

If you see a Lens pattern that doesn't match one of the three above, capture a short video of the behavior and contact support@door.com.

Low battery behavior

The Latch M2 runs on 6 AA alkaline batteries. When the batteries get critically low, a battery warning appears in the DOOR app next to Device Details for that door — open the DOOR app → Access → tap the door → Device Details.

If the warning appears, perform a Door Sync first to get the most accurate reading, then contact your property manager so they can arrange a battery replacement before you lose access.

If the batteries fully deplete and you can't unlock with the app, doorcode, or Keycard, use the mechanical key to enter. See Latch M2 troubleshooting for what to do if the mechanical key isn't available.

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