Description: Suitable for DIY upgrades of vehicles, ships and tanks, all 4 channels are PWM signals.Out-of-control protection function, to avoid loss due to out-of-control, please refer to the manual for the specific setting method.Customers need to bring their own 4 AA batteries.2.4G technology, highly resistant to anti-jamming.Fine workmanship, easy to install and durable in use. Specification: Material: PlasticTransmitting Power: <100mwModulation Mode: GfskResponse Speed: Pwm: ≤20msRemote Control Distance: the Ground Distance is About 400 MetersReceiver Sensitivity: <-97dbmTransmitter Power Supply Range: Dc 4.5v-9vReceiver Power Supply Range: Dc 4v-14v Size Chart: Remote Control: 113×70×190mm/4.45×2.76×7.48inchReceiver: 32×18mm/1.26×0.71inchBattery: 52×28mm/2.05×1.10inchESC: 41.5×17mm/1.63×0.67inch Package Includes: Optional:A: 1x Remote Control, 1x Receiver, 1x Frequency Line,1x ManualB: 1x Remote Control, 1x Receiver, 1x Lithium Battery, 1x Frequency Line,1x ManualC: 1x Remote Control, 1x Receiver, 1x 160A ESC, 1x Frequency Line,1x ManualD: 1x Receiver (PWM signal) : 1. Please allow slightly error due to manual measurement.2. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!3. Wish you a wonderful on-line shopping!