Vktech AVR USBASP ISP PRGMR Programmer Firmware for KK Multicopter Control Board Support for single-axis / UFO, Y3 3-axis, Y3-type 3-axis, 4 axis, 6 axis, V22 flight mode Suitable for the KK control board of quadcopter and multicopter Color: As the picture Total Length: approx. 26.5cm