1、8 CHANNELS: This wireless remote control transmitter has 8 input channels, with low pulse trigger (NPN), stable transmission and less interference. 2、FEEDBACK FUNCTION: The transmitter has a feedback function, and the LED indicator on the transmitter will indicate the switch status of the receiver. 3、FREQUENCY RANGE: The working frequency is 425-455MHz, can be set through the DIP switch, as long as the transceiver frequency and ID setting are consistent. 4、FAR CONTROL DISTANCE: Wireless remote control transmitter, the longest transmission distance in the field is 2 kilometers, with a wide range of applications. 5、MULTIPLE USAGES: Used in smart home, identification system, remote motor control system, PTZ control, LED dot array screen, farm remote access control system, etc. 1 x Remote Control Transmitter1 x Antenna Item Type: 8 Channel TransmitterMaterial: ABSWorking Voltage: DC12VWorking Current: 12-30MAInput Channels: 8 channels, low pulse trigger (NPN)Transmit Power: 22dBmWorking Frequency Band: 425-455MHz (can be set by DIP switch)Longest Transmission Distance in the Field: Approx. 2km / 6561.6ft