AFHDS (Automatic Frequency hopping Digital System), is developed by FLYSKY for all the Radio Control model lovers and is patented by FLYSKY at home. The system is specially developed for all the Radio control models, that offers super active and passive anti-jamming capabilities, very low power consumption and high receiver sensitivity. With extreme rigorous testing by engineers and studying the markets for years, FLYSKY AFHDS is now considered to be the one of the best systems available in the markets. SpecificationsChannels: 3 ChannelsModel type: Car / BoatRF Range: 2.40 - 2.48GHzBandwidth: 500HzBand: 160RF Power: Less than 20DB2.4G System: AFHDSCode type: GFSKSenditivity: 1024Low Voltage Warning: Yes (Less than 3.7V)DSC Port: Yes (3.5mm, Output: PPM)ST Range: 90TH Range: 45 (F:30, B:15)Charger Port: Yes (USB)Power: 3.7V (800mAh)Weight: 346gANT Length: 98.5mmSize: 151 x 183 x 116mmCertificate: CE, FCCPackage Includes1 x FS-GT3C Transmitter1 x FS-GR3C Receiver1 x Charging USB Cable1 x 800mAh 3.7V Transmitter Li-Po Battery1 x Extra Handle (Large Size)1 x English Manual CD1 x Color Box