Specifications include, but are not limited to: Basic System Requirements C.3.1.1. An outdoor warning siren, radio, radio coax, minimum 3db gain antenna, controller, decoder, batteries, pole, all mounting hardware and cabinets. C.3.1.2. In compliance with FEMA CPG 1-17 Outdoor Warning Systems Guide, sirens shall not produce sound pressure level greater than 123dB at ground level to prevent hearing damage. This must be certified by the manufacturer. C.3.1.3. An audible outdoor warning device, rated at minimum of 120dB/100 feet. Outdoor warning siren shall produce a minimum of two signals as specified by FEMA CPG 1-17. C.3.1.4. Sirens must be able to operate on noncommercial power. C.3.1.5. Must comply with all applicable government regulatory specifications, particularly FEMA and OSHA.