Household 5-85 degree LED digital no battery Thermometer Specification:Product name: LED thermometerProduct weight: 140gColor: SilverSize: 81*80.6*30mmMaterial: ABS (electroplating), PCNut specification: gb 4min (1/2 in.)Temperature range: 5-85Measurement error: within 0.5Measurement accuracy: 0.5Dimensions: connect to standard 1/2 inch hose or sprinkler head.Features:* Quick and easy installation without any tools - fits with handheld showerhead * No batteries required - The device harvests its energy from the water flow * High-precision temperature sensor, a hydro power generator, a thermal sensor, and a digital LED display * 360rotatable waterproof led screen for better viewing * Materials approved for drinking water * With this device, you can easily monitor the real time water temperature, and take a more enjoyable shower Notice:* Please install this thermometer manually, don't use tools such as wrenches. Otherwise, the thermometer will be damaged and won't work. * If the thermometer makes noise, it is because you have tightened the screw too tightly. If you loosen it a little bit, the noise will disappear.* This product relies on water flow to generate electricity, so low water pressure may result in darker or even no display on the display.