Features:

• Adopts PIR detection technology and automatically plays the sound file when a human body is detected.
• The detection distance of the PIR sensor is up to 6 meters, and the detection angle is 120 degrees.  
• Built-in a high quality MP3 player with high audio reproduction. 
• Works with most Windows, Mac, and Linux systems
• Able to record/update the sound files through the micro USB port. (micro USB cable included)
• Equipped with 512MB SD memory by default (supports max. 32GB).
• Supports to multiple sound files in the memory and play next one of the tracks after each activation. 
• Internal 20 Watt power amplifier for loud and clear sound output.  
• Volume is adjustable through the potentiometer on the housing.
• Uses a solid and durable aluminum housing to ensure waterproof class IPX6. 
• 12V DC power input (12V AC/DC power adapter included) also possible to use a 12V external battery (not included).  
• Easy installation and it works as long the power is up. Installation Hardware brackets supplied.
• Dimensions: 315mm x 152mm x 90mm (12.4" x 6" x 3.5")

Datasheet:

• http://www.electronics123.net/amazon/datasheet/Waterproof%20PIR%20Motion%20Sensor%20Activated%20Audio%20Player(FNM-802)%20V1.0.pdf