2.4G technology, FHSS 67 channels with frequency-hopping spread spectrum, highly resistant to anti-interference. The response time of the receiver is 2ms, providing fast response and better control. Smooth and very sensitive to control inputs and stable at distances from 200-300m. Compatible with a variety of vehicles, suitable for RC cars, RC boats and RC tanks. With safe brakes and malfunctions, beyond the control of protection function. Each of the 3 channels can be set accordingly, supporting mixed 1 and 2 channel control. Transmitter voltage range. 4.8V-6V Warning Voltage: Receiver voltage range. 3.3V-6V, working current 30mA, support high voltage servos. Transmitter Specifications:Channels: 4Mode Type: RCRF Car Boat Tank Power: Less Than 20dbmResponse Time: 10s-12ms Control Distance: About 200-300m Input Voltage: 4.8V-6Vor 1.5aaa*4Low Voltage Warning: 4.5VS Receiver Specifications:Channels: 4Frequency: 2.4GHzColor: BlackMaterial: Plastic Package Contents:1*Transmitter1*ReceiverOnly the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture to be slightly different from the real thing. The allowed measurement error is +/- 1-3cm.