Feature:1. 2.4G frequency, stable signal. Only use FHSS frequency hopping algorithm, multiple people can operate in the same place at the same time without interference. The ground remote control distance is stable 400 meters.2. Can be set to runaway protection, 1-2CH can be set to mix control mode, fine-tuning button can be set to lock.3. Fine craftsmanship. Standard sponge wheel, exquisite electroplating of the hand wheel, high-grade PVC panel, every detail is finely processed.4. Ergonomics, comfortable hand feel, not easy to sweat.5. Large battery compartment, innovative detachable battery box, can be directly inserted into the 2S lithium battery balance port, convenient and practical.Specification:Features:2.4G frequency, stable signal. Only use FHSS frequency hopping algorithm, multiple people can operate in the same place at the same time without interference. The ground remote control distance is stable 400 meters.Can be set to runaway protection, 1-2CH can be set to mix control mode, fine-tuning button can be set to lock.Fine craftsmanship. Standard sponge wheel, exquisite electroplating of the hand wheel, high-grade PVC panel, every detail is finely processed.Ergonomics, comfortable hand feel, not easy to sweat.Large battery compartment, innovative detachable battery box, can be directly inserted into the 2S lithium battery balance port, convenient and practical.Specification:Item Name: CT-400 TransmitterModel Type: Car/Boat/TankChannels: 4CHRF Range: 2.4Ghz ISM(2.4005-2.483.5GHz)RF Power: <100mWModulation: GFSKSpread Spectrum: FHSSReaction Speed: PWM:≤20msRF Distance: Ground 400MReceive Sensitivity: <-97dbmTransmitter Voltage: DC 4. 5V-9VBattery: need 4*AA battery(not included)Size: 21.3 * 11.7 * 11.5cmPackage Information:Package Size: 26.5*20.5*14cmPackage Weight: 409gGift Box PackagingPacking List:1* Remote Controller1* ReceiverPackage List:1* Remote Controller1* Receiver