Alarm.com Access Control Readers (ADC-AC-ET10, ADC-AC-ET20, and ADC-AC-ET25) offer a modern aesthetic and a state-of-the-art feature set, including Proximity (125 kHz), MIFARE DESFire (13.56MHz), NFC, and Bluetooth. All readers are fully OSDP compliant and are enabled for OSDP Secure Channel. Alarm.com Access Control readers also exclusively support mobile access credentials, allowing businesses to support their existing credentials while transitioning to encrypted smart credentials for improved security. For more information, see Access Control Mobile Credentials.