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: Plastic Transmitting Power:<100mw Modulation Mode: Gfsk Response Speed: Pwm: 20ms Remote Control Distance: the Ground Distance is About 400 Meters Receiver Sensitivity: <-97dbm Transmitter Power Supply Range: Dc 4.5v-9v Receiver Power Supply Range: Dc 4v-14v Size Chart: Remote Control: 11370190mm/4.452.767.48inch Receiver: 3218mm/1.260.71inch Battery: 5228mm/2.051.10inch ESC: 41.517mm/1.630.67inch Package Includes: Optional: A: 1x Remote Control, 1x Receiver, 1x Frequency Line,1x Manual B: 1x Remote Control, 1x Receiver, 1x Lithium Battery, 1x Frequency Line,1x Manual C: 1x Remote Control, 1x Receiver, 1x 160A ESC, 1x Frequency Line,1x Manual D: 1x Receiver (PWM signal) Note: 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!