About this product
The KK2.1.5 is a multi-rotor flight controller built around an ATmega644PA microcontroller with an MPU6050 gyroscope and accelerometer. An onboard LCD and four buttons allow airframe selection, gain tuning, and basic setup without a computer, and the cited board is specified for 4.8-6.0 V input with self-level support. Receivers connect to the input header and the speed controllers to the motor outputs.