Specification: 1. LED Qty: 4pcs; 2. LED lighting color: Green/ Blue/ Red ( Temperature detectable) 3. casing material: ABS+ PC 4. Surface treatment: Electroplating 5. casing color: metallic color " 6. Products are International certification: CE certification and ROSH certification and obtain the certificate" 7. When water flows down, the LED will light instantly and automatically 8. low-flow water to maintenance a unique sense of comfort 9. Don’ t need battery and the power cord; " 1) .When water flows down, the LED will light instantly an automatically; When water temperature is d32 , Green color will show automatically ; " 2) .When water temperature is between 33 -41 , Blue color will show automatically; 3) .When water temperature is between 42 -45 , Red color will show automatically; 4) .When water temperature is above 46 , Red color will flash immediately. 5) .This item will change its color by detecting water temperature.