The new L-Series Universal Expander Plate for Dual Strobe and Dual Strobe with Speaker lowers costs and improves aesthetics by performing the functions of 2-3 devices for emergency communications applications. Cut costs, speed installation, and improve aesthetics on emergency communications applications that require fire and emergency warnings by combining the functions of two to three devices on a single mounting plate and back box. L-Series Universal Expander Plates provide dual strobe and speaker strobe functionality that’s easy for a single person to wire and install. The Universal Expander Plate for Dual Strobe and Dual Strobe with Speaker is designed to be used in 12 or 24 volt, DC or FWR (full wave rectified) systems. Amber lens strobes are UL 1638-Listed (Visual Signaling Appliances) for Private Mode General Utility Signaling. Clear lens strobes are UL 1971-Listed (Signaling Devices for Hearing Impaired) for Public Mode Signaling. Clear lens strobes are compatible with colored lenses for UL 1638 Private Mode General Utility Signaling. All L-Series products are suitable for use in synchronized systems. The System Sensor MDL3 module may be used to provide synchronization if the sync protocol is not native to the panel.