Optional Part It's used to control the motor forward,reverse and stop.usually used to control the radar rotation,turret rotation and pump and other functions....

Absolutely Necessarily Part It's used with the brush motor...

Absolutely Necessarily Part Performence is similar to the FUTABA3003 standard servo. The ARTR is already including this Servo....

Optional Part Very tiny photo transmitter module,including the CMOS camera(360 lines). 2.4G wireless video transmitters.use the standard receiver, pulg and play directly from the receiver to take power. with four frequencies. please require clear when you order. generally recommend to install at the diver position....

Include 6 ch protect,such as loss signal,leak,low voltage,high pressure,deep protect....