The F1-ASF-300 is an addressable wall-mount sounder/flasher developed for indoor fire alarm systems that require both sound and light indication. According to the uploaded product literature, it is powered by the loop, includes a built-in isolator, and communicates through the system protocol. Its design supports dependable performance in indoor environments, including smoke-filled conditions where visual indication is also important. The unit is compatible with WISE and other SENS addressable panels and supports easy address programming with a handheld programmer.