Once your OTERR application has been approved, you must download the SentriKey Real Estate application from either the App Store for IOS devices or Play Store for Android devices. If you need assistance downloading the SentriKey Wireless App, please select one of the links below. Apple iOS Android The app supports both Bluetooth wireless technology and Near Field Communication (NFC). If you need assistance learning how to open the lockbox, please watch the videos available through the links below: Open the lockbox using BlueTooth. How to Open a Lockbox Key Compartment with Touch-N-Show Sentrilock provides many resources, training, and support available here: https://www.sentrilock.com/support/  WRAR has also created this simple guide (Welcome to OTERR’s SentriKey Real Estate App) which you can review here.