System Sensor L-Series Drop-In Ceiling speaker strobes, speakers and strobes install faster than the traditional ceiling speaker or speaker strobe appliances. Neutral grill pattern makes this an excellent option for schools, office buildings, retail, restaurants, and hospital applications. Quickly upgrade your existing Horn Strobe application to a voice system or spec this for your next new construction project. These devices also enable faster installations by providing quick wire nut connections, rotary switches to select voltage and power settings, and seven field-selectable candela settings for ceiling speaker strobes. The low total harmonic distortion of the L-Series speaker offers high fidelity sound output while still offering high volume sound output for use in high ambient noise applications.