Versatile and User-Friendly Design: The MP3 Downloadable Wireless PIR Motion Sensor Activated Player is a versatile and user-friendly device that serves multiple purposes. It is designed to be a welcoming chime bell for shops and stores, providing a warm and greeting to customers. The device is equipped with an infrared motion sensor that detects human presence within a 3-7meter range, triggering the playback of your chosen MP3 audio files. This feature makes it an ideal solution for creating an audible warning for restricted areas or assisting people with Dementia. Easy Customization and Setup: Setting up the MP3 Player is a breeze. It comes with a micro-USB interface that allows you to connect it to your computer for easy MP3 file updates. The device supports MP3 audio format, ensuring excellent sound quality. With two volume levels to choose from, you can adjust the volume to suit your needs. The device also includes a power-off memory function, which means it will remember the last played audio file, ensuring that your greeting or warning is consistent every time. Reliable and Energy-Efficient: The MP3 Player is designed to be reliable and energy-efficient. It operates on standard 32Mbit (4M byte) SPI-flash memory, ensuring that your audio files are securely stored. The device is powered by 3 AAA batteries or USB power, providing flexibility in power supply options.(Not included batteries) The built-in 8Ω1 watt speaker delivers clear and audible sound, making it an effective tool for various applications. Whether you're looking to create a special door entrance greeting or raise attention in a point of sale display, this device is a smart choice for commercial and personal use. Audio Format: MP3 Detection Distance: 3-7m Detector Type: Infrared Motion Sensor Working Current: Less than 130mA (DC4.7V)