T238 CNC High Torque 33000 RPM Brushless Motor (Long Shaft / Short Shaft)HIGHLY EFFICIENT. DURABLE AND RELIABLE. 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. Do not use ETUs