One channel controls the speed of the main rotor. The second channel controls the tail rotor speed so the helicopter can turn or yaw left and right. Entry level rc helicopter, suitable for children for the first time engage on rc helicopter. Left side of remote control is to control the speed, you can control the helicopter up and down. Start with small speed at beginning of flying, to avoid big ups and downs. The right side of remote control control the direction of left and right. Tip: avoid unattended for long periods, should stop flying off the fuselage and the remote control power switch. Remote itself with a usb cable can charge to aircraft. Recommended rechargeable battery for recharge once battery finished. Product dimensions product Length :28 cm product height :13 cm general details age group : 14 - 20 years type :planes and helicopters material :metal, coil scale :1:5 character :remote control airplane manual control features remote control range :6 m remote control features :up/down, left/right, forward automatically, easy to fly speed supported :15m/h, channels supported :2, channel control type :radio control power features battery type for remote :1 x, 6 AA battery for remote, 180mah battery in-built battery in helicopter :no powered by :battery special features sound support :yes in the box helicopter, pilot lamp, power switch, throttle stick, channel selector, remote control. Please refer to the troubleshooting steps below: The transmitter of the helicopter has to be calibrated to the helicopter by the following steps: 1. Turn OFF the helicopter and the remote. 2. Ensure new Batteries are put in the Transmitter. 3. Turn ON the helicopter. 4. Turn ON the transmitter quickly after that. 5. Use the left joystick of the transmitter to move UP and DOWN. After performing the above steps, the transmitter will get connected to the helicopter. For the charging issues, the helicopter needs to be switched OFF while charging.