Hobbypower 2.4G Radio Signal Amplifier Booster Longer Flying Distance Extender Enhancer for DJI Phantom Transmitter TX Extend Range Increase the control range and reliability for your 2.4G radio system, especially for FPV application. Suitable for 2.4G radio system and 2.4G launch receiving equipment, like WIFI Router With the increasing on-board wireless electronic devices like FPV application, the interference between different devices also getting more and more severe, and the radio system range and reliability also greatly affected, this amplifier is just designed to increase the range and reliability of your radio system. IMPORTANT: The module requires 3.7-5.5V power supply, higher than this voltage range may damage the module permanently and NOT covered by warranty. IMPORTANT: When use BEC unit as power supply, only high quality BEC can be used otherwise it may introduce interference to the system,must install the antenna first, then turn on the power, or will destroy the module.