Faucet Joint, 3-Way Faucet + Automatic Sprinkler

Color: Blue.
Faucet Joint 3-Way Faucet + Battery-Free Automatic Sprinkler

I bought this but it didn't fit my home's faucet and I don't know how to install it. I'm looking for someone who knows how to use it to purchase it (T_T)

- Color: Gray and Blue
- Size: 18.5 cm x 16 cm
- Features: Battery-free mechanical timer, automatic watering up to 120 minutes
- Design: Ergonomic design, easy to operate with a large knob
- Connection: Swivel joint for easy connection to hoses and faucets

Thank you for looking.