Description: Remote Controller: 6 Channel 2.4G Car/Boat Remote Control Double Motor Rudder Turn DIY Spare Parts for RC Underwater Boats Model Remote Distance: The remote control range is about 700 meters on the ground and about 400 meters in the water (the receiver antenna needs to be exposed) Application: For dual motor differential models, RC boats, cars, tanks. the 6 channel remote control can differentially turn and servos. 2.4G , the handle comes with lithium battery. Method of Use: You can at a constant speed, push the throttle to the desired position, press the on the back, release the button, the throttle is locked, and the boat will automatically sail with the throttle fixed. You can press the C and D keys to increase or decrease the , or push the to accelerate. Press the E key again to unlock and throttle control. Button Description: The four small buttons correspond to , the top two are AB, the bottom two are CD, and the only on the back is the . Specification: Material: Pp Size Chart:Remote Controller 15x5.3x5.5cm/5.91x2.09x2.17inch Package Includes:1x Remote Controller