Features:

The color's change remind you the water's temperature.
Water flash red when temperature above 50C
Water glows Red when water is Hot (temperature above 42C).
Water glows Green when water is Warm (temperature is 33C - 41C).
Water glows Blue when water is Cold (temperature below 32C).
No need batteries or any  external power supply， it will illuminate after water flows down.
Offer you a delight & wonderful experience.
ABS chroming material， excellent corrosion resistance， durable.
Ideal for bathroom or kitchen and make fantastic.
Internal diameter: 15mm
External thread diameter: 22mm
Item size: 35 * 24 * 24mm
Item weight: 20g
Color: Silver
Package:
1 x LED temperature control tap