The System Sensor L-Series offers the most versatile and easy-to-use line of horns, strobes and horn strobes in the industry with low current draws and modern aesthetics. Also, System Sensor P2RLA-E can meet virtually any application requirement with white and red plastic housings; standard and compact footprint devices. The entire L-Series product line, wall-mount horns, strobes and horn strobes include a variety of features that increase their application versatility while simplifying installation. Besides, all devices feature plug-in designs with minimal intrusion into the backbox; making installations fast and foolproof while virtually eliminating costly and time-consuming ground faults. To further simplify installation and protect devices from construction damage, the System Sensor P2RLA-E mounting plates utilize an onboard shorting spring, so you can test wiring continuity before the device is installed. L-Series devices easily adapt to a suit a wide range of application requirements using field-selectable candela settings, automatic selection of 12- or 24-volt operation and a rotary switch for horn tones with two-volume selections.