1, DS3225MG servo is suitable for 1/8, 1/10, 1/12 Scale Crawler Truck, RC Car / Robotic arm / Boat and other remote control models | 2, It is water resistant servo, not waterproof servo, it works if gets a little wet, but can’t work under the water, so pls be careful not to get it submerged in water, otherwise, it will be ruined | 3, Control system: PWM(Pulse width modification), sensitive response, Pulse width range is around 500~2500