Electro Guard Watch – YF-0155, The Remote Detective System:

Wireless Detector and Receiver: This system includes a wireless detector that communicates with a receiver, designed to notify you when motion or presence is detected.
Detection Range: Detects activity and sends a signal from up to 400 feet away, making it ideal for use in areas such as front doors, window frames, driveways, and walkpaths.
Key Features:
Helps detect unwanted people or intruders.
Notifies when family members leave or enter the house.
Allows for a surprise greeting for visitors.
Wall-mountable, with low energy consumption.
Wireless operation with no installation needed.
Battery Operation: Alkaline batteries are recommended for use, but they are not included with the product.
Applications: Suitable for home security, monitoring family members, and general area surveillance. It can be easily installed in key locations where monitoring is required.
Certifications: CE and RoHS compliant, ensuring safety and environmental standards.
Country of Manufacture: Made in China.

This device is user-friendly and provides a convenient way to monitor various areas of your home or property wirelessly without complex installation.