System Sensor SPSCRL Red Ceiling Mount Speaker from the L-Series of devices It simplifies installation with instant feedback to ensure proper wiring, rotary switches for voltage and power settings, and 7 field-selectable candela settings for both wall and ceiling speaker strobes. The plug-in design and universal mounting plate reduce costly ground faults, and a protective plastic cover prevents nicked wires. Features: 15, 30, 75, 95, 115, 150, and 177 candela No extension ring required Rotary switch simplifies field selection of speaker voltage Tamper-resistant Modern aesthetics Specifications: Mounts to a 4 x 4 x 2 1/8-inch back box Uses a universal mounting plate for ceiling and wall products Notification appliance circuit and amplifier wiring terminate at the universal mounting plate L-Series speaker strobes, when used with the Sync-Circuit Module accessory, are powered from a non-coded notification appliance circuit output and operate on a nominal 12 or 24 volts With a weight of 3 lbs and dimensions of 8 x 8 x 6 in, the System Sensor SPSCRL provides reliable and efficient sound for any commercial or residential setting.