The AMC25 contains 25 mobile credentials that can be added into your ATRIUM system. Give users the ability to unlock doors with their phone when using the ATRIUM BT app. Mobile-PASS are compatible with Krypto Bluetooth readers only. KRYPTO Mobile-PASS credentials can be issued on-site at a reader which allows for instant activation or remotely via email or text message (SMS). Credentials issued remotely are automatically activated when the app is detected by one of the on-site readers.