The model 813 Mini Infrared Motion Sensor Speaker is a high-performance infrared motion sensor with a 3 to 5 meter detection distance. Support custom functions such as micro-USB, volume adjustment, audio selection, etc. In addition, the built-in memory can also be expanded according to the needs, the maximum is 16M bytes, and its standard memory is 32 Mbit (4M bytes). It is widely used in various places such as dry shops, supermarkets, office buildings, convenience stores, hotels, , and homes, etc., bringing convenience, joy and security to the lives of you, your family and friends!, Manufacturer: Akfldms