How to install a smart switch？

This is our switch installation tutorial, this switch is our new product： PIR Occupancy Sensor Switch。
About this item
NEUTRAL WIRE REQUIRED, The Pir sensor switch requires connecting all 4 wires(including the NEUTRAL wire) in order to function properly. Allowing the lights to turn on from multiple switch locations in the room. Please confirm you' re wiring setup before purchase. If you have any doubt, please consult with a licensed electrician.
VERSATILE SETTINGS: The Light switch sensor features adjustable settings. Automatic ON/OFF and Manual ON/Automatic OFF operation, Adjustable time delay from 15sec-1min-5mins-15mins-
30mins, Adjustable sensitivity, Adjustable Light level sensing.
AUTO OFF, MANUAL ON OPTION: The Occupancy switch mode
(Auto ON/OFF) and vacancy switch mode(Manual ON, Auto OFF)
allow you to customize the sensor according to your needs. Save money on your energy bill by making sure unused lights and fans are always turned off with a motion sensor switch. Vacancy mode's manual-on feature saves further energy by ensuring lights is turned on only when needed with a motion sensor switch.
Avoid having lights accidentally left on all day.
CERTIFICATION: Pir light sensor switch have ETL Certified, FCC Listed and California Title 24 Compliant. Multiple certifications, Let the customers be assured.#phone remote control#smart home#siri #alexa