- Compact, ergonomic design with a comfortable grip for everyday use. - No batteries or wires required: the color changing LEDs are powered by running water. - Temperature sensing LED indicator: LED color changes automatically with water temperature green for 31 C or below, blue for 32 C to 43 C, red for 44 C to 50 C. - Easy installation: fits any standard overhead shower arm; no extra tools needed and setup takes minutes. - Temperature controlled three color LED display: visually communicates water temperature to help you choose a comfortable setting and reduce fatigue during the shower. - Compatibility and performance: designed for standard shower systems, delivering a reliable color indication without batteries or external power. - Applications and use scenarios: - Family bathrooms: helps children and parents keep water temp in a safe, comfortable range. - Shared bathrooms: quick visual cue for adults to avoid accidental scalding. - Rental or guest bathrooms: simple retrofit that adds temperature feedback without wiring or tools.