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 control 4 servos. 2.4G signal, the handle comes with lithium battery. Method of Use: You can cruise at a constant speed, push the throttle to the desired position, press the E button 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 accelerator, or push the accelerator to accelerate. Press the E key again to unlock and restore throttle control. Button Description: The four small buttons correspond to ABCD, the top two are AB, the bottom two are CD, and the only one on the back is the E button. Specification: Material: Plastic Size Chart: Remote Controller 15x5.3x5.5cm/5.91x2.09x2.17inch Receiver Board 37.5x20mm/1.48x0.79inch Antenna Length 16cm/6.30inch Package Includes: Optional 1x Remote Controller 1x Receiver Note: 1. Please allow slightly error due to manual measurement. 2. Due to the difference between different monitors, the picture may not reflect the actual color of the item. 3. Wish you a wonderful on-line shopping