There is! Scroll down to check it out or download a copy here.


  1. Open app
  2. Press View Nearby Properties on bottom of screen
  3. Enter serial number in Search field
  4. Phone will verify you and code will display
  5. Press ENT on box
  6. Enter code from phone
  7. Press ENT on box
  8. Door will open


  1. Open app
  2. Press hamburger menu on top left of screen
  3. Press My Lockboxes
  4. Press Release Shackle
  5. Press Get Shackle Release Code
  6. Lockbox should be listed
  7. If not listed, enter serial number in Search field
  8. Phone will verify you and code will display
  9. Press ENT on box to wake it up
  10. Press FUNC, 9, FUNC on box
  11. Enter code from phone
  12. Press ENT on box

Sentrilock fees are due on March 1 every year and paid to AACAR.  If invoices are not paid by March 15, a $25 late fee is assessed.

Invoices are emailed to members in early February.   You can find your invoice, and make payment, on the AACAR web portal.

The  GENI  or  GENII  (silver) REALTOR® lockbox has an internal lithium battery, lithium type 2CR5 battery. The batteries for the silver boxes are $6.00 each at AACAR, and comes with a tool to unscrew the back to change the battery.

Note: Do not remove old batteries from a lockbox until you have a replacement in hand. Also, do not carry unpackaged batteries in your pocket or purse as metal objects could cause a short circuit and thereby cause bodily harm or property damage.

The  NXT  or  NXT Wireless REALTOR® lockbox has internal lithium batteries.  To replace the batteries in a  NXT or  NXT Wireless (blue)lockbox, you’ll need: 2 lithium type CR123A batteries. Contact your Association in regards to obtaining batteries for your lockbox.  A Phillips head screwdriver is needed to remove the battery covers screws.

Note: If the lockbox shows no signs of activity and you cannot access the key compartment, the battery is dead. You can use a power paddle to provide a temporary charge to the lockbox and access the battery compartment.  Contact your Association to obtain a power paddle.

The  Bluetooth ® lockbox with external Power Port has internal lithium batteries. To replace the batteries in a The Bluetooth ® lockbox with external Power Port, you’ll need: 2 lithium type CR123A batteries and a battery replacement kit. The kit and batteries are $16.00 at AACAR, and comes with a tool to unscrew the cover.

New Members: You need to first join the Anne Arundel County Association of REALTORS®. Once your membership application has been processed, you will receive an email confirmation on how to obtain your SentriLock service.  You can download and fill out the SentriLock Agreement and email it to Tonia Hawkins, tonia@aacar.com.

Once you are approved, SentriLock will send an email to create a PIN and PASSWORD to use in the Sentrikey app.

Existing Members: If you need a replacement card, email Tonia Hawkins, tonia@aacar.com.