Orange HD Propellers 7038(7X3.8) ABS Black Props 1CW+1CCW-1pair Raspberry Pi Zero Kit first identify your microcontroller's available

first identify your microcontroller's available communication interface: SPI is recommended for simplicity and speed

Always verify your specific power supply voltage and speaker impedance to calculate exact output capabilities for your application

Accurate M-squared determination requires capturing beam profiles at multiple distances along the propagation axis

and resellers

the black wire is to connect to the negative pole

Orange HD Propellers 7038(7X3.8) ABS Black Props 1CW+1CCW-1pair Raspberry Pi Zero Kit first identify your microcontroller's availableOrange HD Propellers 7038(7X3. 8) ABS Black Props 1CW+1CCW 1pair Orange HD Propellers 7038(7X3. 8) ABS Black Props 1CW+1CCW 1pair The Orange HD Propellers 7038(7X3. 8) ABS Green is the high quality propellers specially designed for multi copters. These Orange Propellers are light in weight and high strength propeller has a 15 degrees angle design at the end of the propeller to avoid whirlpool while the multi copter is flying. They are useful in drones