Feature: 1. Using high quality brass material, corrosion resistant, durable and has long service life. 2. Multi-layer electroplating is finely processed, not easy to rust and corrode, easy cleaning. 3. Intelligent sensing technology, 15-20cm sensing distance, which is more convenient to use. 4. Adopts near infrared application technology with a wavelength of 700mm-2000mm as the main sensing distance. 5. With highly sensitive receiving photosensitive material, sensitive and convenient, battery powered.