The LiftMaster SRDRMM is a mullion-mount smart reader that supports BLE, proximity, and smart credentials. Built for indoor / outdoor use with OSDP autodetect and myQ mobile credential access. The LiftMaster SRDRMM Mullion Mount Smart Reader offers multi-technology credential support, including 125kHz proximity, 13.56MHz smart cards, and Bluetooth. It features an OSDP autodetect function for automatic switching from Wiegand to OSDP, and includes BLE communication for mobile credentialing via the myQ Community app. An integrated accelerometer provides tamper alerts, while the tri-color LED bar offers real-time feedback. Rated IP55, it's suitable for both indoor and outdoor installations.