LED Display Home Water Shower Thermometer Flow Self-Generating Electricity Water Temperture Meter Monitor Energy Smart Meter  for Baby Care.    No batteries required - The device harvests its energy from the water flow Quick and easy installation without any tools - fits with handheld showerhead Materials approved for drinking water;  Newest innovated technology to upgrade and modernize your bath room;self powered battery free thermometer to monitor your shower temperature.;  As home essential Needed - to serve and surprise your husband, wife or kids.(Especially for families having toddlers or babies);  High-precision temperature sensor 360°rotatable waterproof led screen for better viewing;  Elegant and sleek design - premium quality even fit to all five star hotels level;  ( The Tecboss LED Digital Shower Thermometer is an inspiring and surprising technology to give people a real time monitor of the shower temperature. It is self powered, mainly comprises a hydro power generator, a thermal sensor, and a digital LED display. With this device, you can easily monitor the real time water temperature, and take a more enjoyable shower :)     Specification: Material:ABS, PC;  Size:connect to standard 1/2 inch hose or shower head;  Temperate Range:5-85℃;  Weight:80g;  Thread type:1/2 NPT;     Package Includes : 1 x LED Display Water Temperture Meter Monitor