Buy SentriGuard lockboxes (SentriLock's Generation 4 lockbox)Each SentriLock lockbox purchase includes lithium-ion battery, setup, and shipping.
How do I change the SentriLock Generation 3 lockbox batteries?
How to reset your SentriLock Generation 3 lockboxStep-by-step help to reset your SentriLock Generation 3
What does the SentriLock Generation 3 lockbox "Error DND" mean?The date/time on the SentriLock lockbox may be incorrect
The SentriGuard lockbox: what's new?
How do I use the SentriLock Generation 4 lockbox auxiliary batteryEngage the SentriGuard backup battery to power the lockbox.
SentriLock lockbox (Generation 3 & 4) Troubleshooting and Replacement Form