The A-Star 32U4 Prime LV MicroSD (SMT) with A-Star 32U4 Prime is a USB-based, low-voltage microprocessor board designed and manufactured by Pololu. It is equipped with an ATMEGA32U4 microcontroller, USB B micro port, and a microSD card slot, allowing it to store and process large amounts of data. The board is powered by a voltage range of 2 to 16 VDC and has 7 PWM channels. It has an ultra-low-power design, with a wide range of features and capabilities, including support for both I2C and Serial UART communication protocol, and a built-in voltage regulator for supplying low voltages. The board can also be programmed via the Arduino IDE or by using a C/C++ compiler.