3-color indication: Green for 32 degrees, Blue for 33-41 degrees, Red for 42-45 degrees, which allows for awareness of water temperature by vision instead of touch.Eco-friendly product with no requirement of battery or other power supply.CE and RoSH certificated. LED quantity: 9 pcs.LED lighting color: Green/Blue/Red.Cover material: ABS.Surface finish: Electroplating.Cover color: Metallic silver