The FS-i6X transmitter and FS-iA6B receiver constitute a 6 channel 2.4GHz AFHDS 2A digital proportional computerized RC system. This system offers superior protection against interference while maintaining lower power consumption and high reliable receiver sensitivity. It is specially developed for all radio control models. FS-i6X Transmitter Specifications: Channels: 6-10 (default 6) Model type: Fixed-Wing/Glider/Helicopter RF Range: 2.408-2.475GHz RF power: <20dBm RF Channel: 135 Bandwidth: 500KHz 2.4GHz system: AFHDS 2A / AFHDS Modulation type: GFSK Stick resolution: 4096 Low voltage warning: <4.2V DSC Port: PS/2 Port Chargeable: No Antenna Length: 26mm (Dual Antenna) Weight: About 400g Power: 4 * AA battery (not included) Display: STN transflective display, LCD 128*64 lattice, VA 73*39mm, LCD with white backlight Size: 190 * 174 * 89mm On-Line Update: Yes Color: Black Certificate: CE0678, FCC ID: N4ZFLYSKYI6X FS-iA6B Receiver Specifications: Channels: 6 Model type: Airplane/Glider/Helicopter RF range: 2.4055-2.475GHz RF channel: 140 RF receiver sensitivity: -105dBm Bandwidth: 500KHz 2.4GHz system: AFHDS 2A Modulation type: GFSK Power: 4.0-6.5V DC Compatible transmitter: FS-i6X, FS-i4, FS-i6, FS-i10, FS-GT2E, FS-GT2G Antenna length: 26mm (Dual Antenna) Weight: 16.3g Size: 47 * 26.2 * 15mm i-BUS port: Yes Data acquisition port: Yes Package Information Package size: 23.2 * 20.8 * 10.5cm / 9.13 * 8.18 * 4.13in Package weight: 666g / 1.47lb Gift box package Package List: 1 * FS-i6X Remote Controller 1 * FS-iA6B Receiver 1 * Bind Plug 1 * Manual