TransmitterParameters:Channels: 3CHRF: 2.4GHzRF Power: <20dBmCode Type: GFSKSensitivity: 1024GBControl Distance: about 100m(ground)Powere supply: 2 * 1.5V AA Battery (not includeded in the package)Antenna Type: Built-in single antennaLow Voltage Warning: <2.4V,The blue light slow blinkData Interface: NoCharging Interface: NOOnline Update: NoSize: 160*100*200mmWeight: 140gReceiver/ESCParameters:RF: 2.4GHzPower Voltage: 7.4VESC: 15A, waterproofLow BatteryVoltage Cutoff : YesSize: 38.2*31.2*14mmWeight: 17gPackage:1 * Transmitter1 * 2 in 1 ESC&Receiver