Feature:1. [WIRELESS CONTROL] The wireless relay module can read or control the relay status via RS485 bus or 433M wireless, and can also read the input status.2. [MATCHING DEVICES] Can be used with RT5BF01 wireless transmission module or other for N4RFA04 devices to use the wireless remote IO function.3. [PARAMETER SETTING] The module can set 5 parameters through the dial switch, namely, device address, RS485 switch, wireless switch, baud rate and channel.4. [WORKING RANGE] The wireless frequency range is 426-508.5MHz, the wireless transmission distance is 800-1000 meter (unobstructed open space).5. [WIDE APPLICATION] Widely used in PLC IO expansion board, smart home, security monitoring, identification system, network camera, LED light driver, etc.Specification:Item Type: Wireless Relay ModuleStandby Current: Default 20mA, turn off wireless transceiver function 12mABaud Rate: 9600 19200 38400 115200, default 9600, N, 8, 1Wireless Working Frequency: 426MHz-508.5MHz, 16 channels, channel interval 5.5MHz, default 426MHzTransmission Power: 20dBmReceiving Sensitivity: -113dBmWireless Transmission Distance: 800-1000 meters (Unobstructed open space)Product Size: Approx. 144 x 92 x 40.5mm / 5.7 x 3.6 x 1.6in.Package List:1 x Relay Module1 x Antenna Note:In addition to the conventional RS485 control, users can also use N4RFA04 with RT5BF01 wireless transmission module for data transmission without laying too many and too long signal transmission lines. The N4RFA04 module only needs to be powered on to realize remote control. It is very convenient for users to remotely operate N4RFA04 equipment, effectively avoid rust, broken line, poor contact, etc. of the signal line, and also very convenient for users to operate N4RFA04 from a remote place.