Solar Sync™ Sensor (SOLARSYNCSEN) provides on‑site measurement of solar radiation and air temperature to calculate evapotranspiration (ET) and deliver daily seasonal adjustment values to compatible irrigation controllers. Automatically adjusts irrigation run time using ET-based seasonal adjustments to match local conditions and reduce water waste. Integrates Hunter Rain‑Clik™ and Freeze‑Clik® for Quick Response rain shutoff and freeze protection near 37°F (3°C). Includes 25' (7.5 m) factory-mounted wire and gutter mount; sensor-to-module wiring is extendable up to 200 ft (60 m) for flexible placement. Module not required for X‑Core, I‑Core, and ACC controllers; wire directly to controllers that support Solar Sync. Rugged UV-stable polycarbonate housing, adjustable vent ring for reset timing, and maintenance‑free operation suitable for residential, commercial, and municipal sites. Dimensions: 3" H x 9" W x 1" D (7.6 x 22.9 x 2.5 cm). UL listed and direct burial/UV approved. Easy to mount and wire, the Solar Sync Sensor simplifies irrigation scheduling and helps conserve water while protecting landscapes from over- or under-watering. See the included Owner's Manual and product literature for detailed installation, wiring diagrams, and programming guidance.