USBtinyISP is designed for AVR ,based on USB connector's ISP downloader. Officially supported by for IDE and compatible usbtinyisp, burn for bootloader onto chips, and practically program any AVR microcontroller by this powerful AVR ISP programmer. The Tiny ISP Programmer is to provide the 5V power supply voltage to the board being programmed. If you want to power the board through the ISP you have to close the SJVCC jumper on the board. With this programmer you can upload sketches and burn the bootloader on any AVR based boards, including for Arduinos. By uploading a sketch with an external programmer you can remove the bootloader and use the extra space for your sketch. The for ISP can also be used to burn the for bootloader, so you can recover your chip if you accidentally corrupt the bootloader. Burning the bootloader is also necessary when you use a ATmega microcontroller in your for , and you wish to use the bootloader to upload a sketch via the USB-Serial connection. Supports ATTiny45 and ATTiny85 chip for programming,etc. Supply voltage:5 V Microcontroller:ATtiny44 (datasheet) Connection with the computer:micro-USB Connection with the target board:ICSP Board size:23x14mm() HOW TO USE: Connect the for ISP to your for board's ICSP headers. Make sure to match the orientation of the plugs by looking at the white dot on the corner of the connector Open for IDE ,chose the hardware name downloaded in the"board" Select the "USBtinyISP" under "Burn Bootloader" menu Then bootlaoder begins to download and completed after 10 seconds(). Color:As Shown Material:PCB Package Contents: 10 * Miniature Encoder Module Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.