Willkommens-Türklingel mit Infrarotsensor, abnehmbar, kabellos, smart, für Hotels

Note: The price of this product does not include tax. For invoicing with added tax, please contact customer service. Thank you! The sensor doorbell can detect objects with a temperature difference from the ambient temperature, including animals or hot and cold air that differs from the environment temperature. When installing, try to avoid locations with strong air currents, such as above an air conditioning vent at the store entrance. The mounting bracket can be rotated to adjust the installation angle, but it cannot be installed behind glass It can be powered by three AA batteries or DC5V, but fast charging is not supported