Built-In Extra-Large Capacity Battery with Over 6000 Hours of Battery Life.1/2 Inch Nut Diameter, Standard 4-Point Connector, Compatible with Most Shower Fixtures, Suitable for Most Home Installations, Easy To Install, No Tools Required. Shower Temperature Indicator ----- Comparing with Traditional Water Temperature Indicator, The New Water Temperature Indicator Has More Functions and Is More . You Can Easily Measure The Water Temperature From 5℃-85℃ with The Touch Screen and Switch Celsius/fahrenheit with A Single Tap. High-Quality Thermistor Sensor Allows Temperature Measurement Accuracy Even Up To 0.5 °C. Easy To Install, Easy To Use ----- One Button Temperature Measurement , Especially Suitable for Babies, Pregnant Women and The Elderly Bathing. Adopt Universal Interface, Easy To Install The Tube Sheet. New Led Screen Waterproof Design with Filter and Waterproof Seal, Waterproof. Led Display, No Need for Light Source, Higher Clarity No Matter How Dark The Environment Is, You Can See Clearly.