T238 High Thermal Efficiency Brushless Motor High Torque High Speed Overheat Low voltage Locked Rotor Protection Stepless Speed Segulation Long Axis Airsoft AEG Motor. Features: Motor body material: CNC Aluminum precision machining Motor gear: D type Brushless, low heat at high output Long service life, battery temperature Emergency stop after power failure, no buffer, stable output Overheat protection, low voltage protection, locked rotor protection Stepless speed regulation (range 50-100%) can be adjusted through the potentiometer of the small hole in the tail cover. ✔Warning!!!This brushless motor is best to use our brand ETU/MOSFET, not compatible with other brands of ETU/MOSFET, if the use of other brands of ETU/MOSFET causes motor failure, no warranty. - Do not use ETUs of other brands! - Do not power the motor in an unloaded state! - Do not reverse connection of positive and negative poles! - Do not use batteries greater than 12.6V!