You can use the following instructions to access the key compartment of a lockbox:
1. Insert your SentriCard® into a lockbox. Wait until the CODE light displays, then press your PIN + ENT.
2. After you press PIN + ENT, the lockbox will display the READY light. You can either remove your card from the box or press FUNC + 3 + ENT to open the box.
(If the lockbox displays the steady CARD and ERROR lights, your SentriCard ® might be expired. You need to renew your SentriCard® if it is expired. If the lockbox displays the steady CARD light and your SentriCard® is valid, the lockbox’s internal clock needs to be updated.)
Also, here are some helpful How To Videos from Sentrilock on opening the key compartment via the SentriKey Real Estate App