Specifications: No batteries required - the device harvests its energy from the water flow. Quick and easy installation without any tools - fits with handheld shower head. Materials approved for drinking water. Newest innovated technology to upgrade and modernize your bath room. As home essential needed - to serve and surprise your husband, wife or kids. (Especially for families having toddlers or babies) 360 degree rotatable waterproof led screen for better viewing. Type: Shower Thermometer Material: ABS, PC Temperate Range: 32-212, 0-100 Features: LED Display, Bathroom Supply, Temperature Monitor Size: 8.1cm x 8.06cm x 3cm/3.19" x 3.17" x 1.18" (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x Shower Thermometer