This PIR motion sensor module is designed for reliable and precise motion detection, making it ideal for a wide range of applications that require automated activation based on movement. Key Features and Benefits: Utilizes passive infrared (PIR) detection technology for accurate sensing of human motion without direct contact. Detects movement within a range of up to 5 meters, providing effective coverage for most rooms and entrance points. Integrated quality MP3 player with builtin 4 megabytes of flash memory to store and play audio files directly. Compact, lightweight design for easy installation in various locations. Built with durable components to ensure longterm performance and reliability. Applications: 1. Security systems: Automatically trigger alerts or prerecorded warnings when motion is detected, helping deter unauthorized entry. 2. Retail environments: Play a custom greeting or promotional message when customers approach a display or entrance. 3. Exhibitions and museums: Automatically activate informative audio guides when visitors enter specific display areas. Function and Performance: The advanced PIR technology detects infrared radiation emitted by the human body, minimizing false triggers caused by environmental changes. Onboard MP3 player allows direct playback without the need for external devices, simplifying installation and reducing system complexity. 4MB internal flash memory provides ample space for audio messages, instructions, or alerts. Compatibility: Works with various audio formats compatible with onboard MP3 playback. Suitable for integration into existing automation, alarm, or audio systems. With its precise detection range, integrated audio playback capability, and dependable build quality, this PIR motion sensor module offers practical solutions for enhancing security, customer engagement, and interactive experiences across multiple environments.