Features: Transmitter and receiver circuit board 100% brand new and high quality Apply to DIY catamaran RC Boat And Rc tanks 2pcs 130 motors can be controlled at the same time. Remote control / Go ahead / back off / Turn left / Right turn Specifications: No battery.Airlines it is prohibited to transport. The remote control frequency :2.4GHZ Open the power supply , Automatic docking frequency The connection error caused the circuit board to be damaged. Suitable for small boats, 2 motors, differential speed Change direction. Don't need a rudder . Transmitter 1# Working voltage : DC 2.2V - 4.5V 2# Can not use a rechargeable / High alkaline battery (High voltage will damage the circuit board ) 3# Using ordinary conventional 2pcs / 1.5V battery Receiver 1# Working voltage : DC 3.6V --10V 2# Sustained current: 3A 3# The Open environment Remote control distance 100m 4# receiver can use any battery , Can use rechargeable batteries Voltage range ( DC3.6V --10V ) 5# item can control 2pcs motors Positive and negative rotation running 6# The power cord, the red line + Positive voltage / The black line -- negative voltage. warning ! ! ! Pay attention to Please carefully identify the item.The wrong Connect can lead to damage of the receiver. ( If damaged,buyers will pay for the receiver )