Features: Compatibility: As it uses SPI pins of ICSP interface, compatible with for R3 / for , can change to the bootloader burner when it is directly plugged onto the two boards. Operating voltage: 5V Operating current: 500mA (max) for board to be burned: support for R3 / / Nano / pro mini (5V 16M) On-board buzzer, if the fuse bit is successfully modified, it sound once, and then if burning bootloader is OK, it sound . If it is not two beeps, burning is failed. You can capture the sound instead of LED lights, so this improve the efficiency of burning. Description: This is a programmer expansion shield that allows your for board to modify the fuse bits and burn bootloader into external chip and other for boards. On-board buzzer and LED indicators, indicating whether the burning is successful, it is convenient for board designers to batch burning. On-board LED indicators, HEART BEAT led lights up like a breathing light when powered normally. During programming, the PROG indicator flashes until it finishes. If the programming is unsuccessful, the ERROR indicator (red) light. Onboard 28P locking seat for Atmega328P, Atmega168P, Atmega8 bootloader burning Onboard ISP_6PIN interface, for the external for board bootloader burning On-board ISP_10PIN interface On-board FT232RL and CH340G USB to TTL programmer interface for uploading code to the chip on the 28P locking seat. Colour: Black Material: PC+metal Package Contents: 1 x Expansion Board 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.