Brushless motors, the electric motors seen in model planes, are slowly being introducef to airsoft. In this video, Kurt of Airsoft Taiwan/RA-Tech shows us the Option No. 1 plug-in brushless motor for AEG. This is the World Version, not the Japanese edition which only requires to be plugged-in and suggested power source is the 7.4V 25A Lipo battery. It has low voltage battery protection function and is not sold cannot be sold in Japan and Taiwan (R.O.C.). Other features are heat protection function with the temperature sensor and automatic power-off when operation goes below 25A. Silver wire is suggested for better performance and it is not compatible with electric trigger units."