RCmall Flysky FS-i6 2.4G 6CH RC Transmitter and Receiver FS-iA6 for Airplane Heli UAV Multicopter Drone ***Important Notice, Pleae Read***---Seller Berryland-AN is selling fake RCmall. We never authorize them to sell our RCmall products. We Received Many Customer Complaints Against Other Sellers for Poor Quality. If You Purchase Here and Receive From Other Seller, Please Report To Amazon for Item Not As Described And Claim for Sell Fake Products And Get FULL REFUND. This radio system uses a high gain and high quality multi directional antenna,it covers the whole frequency band. Associated with a high sensitivity receiver,this radio system guarantees a jamming free long range radio transmission. Works in the frequency range of 2.405 to 2.475GHz.This band has been divided into 142 independent channels,each radio system uses 16 different channels and 160 different types of hopping algorithm. Each transmitter has a unique ID, when binding with a receiver,the receiver saves that unique ID and can accepts only data from the unique transmitter.this avoids picking another transmitter signal and dramatically increase interference immunity and safety. This radio system uses low power electronic components and sensitive receiver chip.The RF modulation uses intermittent signal thus reducing even more power consumption. Package included: 1 X FS-i6 transmitter, 1 X FS-iA6 Receiver, 1 X Manual. 1 year warranty time and friendly customer service. If there is any quesiton, please contact us feel free. Thank you. If you need bulk order, please click RCmall to contact us.