The MTH Series Horn/Strobe and standalone Horn Electronic Appliances offer a choice of eight (8) nationally and internationally recognized alerting sounds: Horn, Bell, March Time Horn, Code-3 Tone, Code-3 Horn, Slow Whoop, Siren or Hi/Lo Tone. The Code-3 Horn and tone patterns are engineered to comply with NFPA/ANSI Temporal Pattern specifications without requiring additional equipment. With MTH horn/strobe and stand-alone horn electronic appliances, one alarm appliance meets most of your signaling needs. The MTH strobes can be synchronized using the 5406B sync modules, MPC-6000 panel, MPC-7000 panel, or RSE-300 power supply with built-in sync protocol. The MTH Strobes are designed for ADA applications while meeting or exceeding the latest requirements of NFPA 72, ANSI 117.1, UFC and UL Standard 1971 as well as meeting ADA requirements concerning photosensitive epilepsy. Each MTH horn/strobe and stand-alone horn electronic appliance has two installer selective sound output levels: STANDARD dBA and HIGH dBA. All models may be used with filtered or unfiltered (full-wave-rectified) input voltages. Separate input terminals are available, shunt wires are provided to enable both tone and strobe to operate simultaneously from a single input. The MTH Series Multi-tone Strobe appliances are UL Listed for indoor wall mount applications under Standard 1971 for Signaling Devices for the Hearing Impaired and under Standard 464 for Audible Signaling Appliances. Designed to meet or exceed ADA/NFPA/UFC/ANSI Standards and Accessibility Guidelines. Complies with OSHA 29, Part 1910.165. Red Weatherproof.