The S/HS-WP Series Outdoor Signals are 24VDC strobes and horn/strobes equipped with a fixed 75 candela strobe.This series of outdoor signals are available in two different versions. The standard version includes a surface-mount back box (WPBB) to install directly on a wall. The Low Profile (LP) versions includes a low profile back box (WPLPBB) designed to be installed on a flushmounted electrical box. The weatherproof enclosure is made of clear Lexan which provides maximum visibility and reliability for effective visible signaling, allowing full 75cd output.The S/HS-WP series strobe has a minimal operating current and a minimum flash rate of 1Hz regardless of input voltage.