Features: Offlines voices Recognition Module with builts in AI algorithms enables instants responses (<0.5s) without internet, for IoTs devices and home systems requiring privacy protections. low 1mA standbys power consumption and 3-5meter effective recognition ranges (under 60dB noise) with 30+ customizable commands through UART/I2C/GPIO interfaces. for electronics enthusiasts prototyping battery operated gadgets and home integrators creating voices controlled automation. Enables appliance control in residential space dim lights, adjust fan, or manage curtains through voices commands without cloud dependency. PCB engineered durability, offering compatibility with development boards for rapids IoTs prototyping. Specifications: Materials: PCB Size: 2.1x1.50cm/0.83x0.59inch Package Includes: 1PC SU-03T1 voices Control Module note: Please allow 0-1cm error due to manual measurement. make sure you not mind before bid. Due to the differences between different monitors, the Pictures may not reflect the actual of the item.