Product instruction:

This small device is suitable for most taps

Water power generation, no need batteries.
3 Colors Changes Depending on the temperature for Kitchen and Bathrooms.

When the water temperature is below 32 degrees, the light color is blue.  

When the water temperature is between 33 to 41 degrees, the right shows green.  

When the water temperature is between 42 to 45 degrees, it will display the red.  

When the water temperature is higher than 46 degrees, the light flashing red
2 PACK with Connectors.

Easy to install, Helps children avoid scalding water.  A device must have for every home.

Made of ABS material with excellent corrosion resistance.  Ideal for bathroom or kitchen, very fantastic and durable.

Specifications:
Case material: ABS
Internal diameter: 1.5cm
External thread diameter: 2.2cm
Item size: 3.5 * 2.4 * 2.4cm
Item weight: 22g

Package including:

1 * LED light faucet
1 * Internal thread adapter

Note:

1. If the LED water faucet lights up, it requires a certain water pressure.  And it won’t light up if the water pressure is too low.

2. This product are just suitable for round water outlet, and if want to install correctly, the outlet should have corresponding screw threads. Here the diagrams: