The Phoenix Edge HVF 160 has a built-in 5 volt DC fan providing the much needed cooling in applications that have little to no airflow to the ESC, keeping your setup running healthy and efficient. It works great in 700- and 800-size helicopters with a full canopy or aircraft where the ESC is mounted inside the fuselage without venting. The fan has a 12-inch standard receiver lead that can be plugged into any channel on the receiver.