This thermometer monitors the shower temperature in real time.The built-in small-scale hydro power system makes it generate currents without any battery. After turning off the water, it'll turn off current automatically.High-precision temperature sensor provides accuracy, the error is only + /-1 Deg.F.360 Degree rotatable waterproof LED screen for better viewing.Compatible with most of the shower equipment, easy to install without any tool needed.A home essential, to serve you and your family. Especially perfect for families having babies.Elegant design, premium quality bath thermometer is perfect for home use and even bathrooms in five-star hotels.Name: Water ThermometerType: Bathroom AccessoriesColour: silverMaterial: ABS+PCSize: single 81.0x80.6x30.0mmPackage Contents:2 * Water temperature gauge2 * Filter waterproof gasket1 * Chinese and English manualOnly the above package content, other products are not included.Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.