The USBtinyISP with buffer is a programming tool for Atmel AVR microcontrollers based on the design by Ladyada. This device provides a convenient way to program AVR microcontrollers and can be used with either a Windows, Linux, or Mac operating system. However, Windows users may need to install a driver in order to use the device. More information can be found at the specified website (https://learn.adafruit.com/usbtinyisp). The driver installation guide can also be found at this website (https://learn.adafruit.com/usbtinyisp/drivers).