1. Wireless Transmission: This transceiver module can transmit wirelessly over long distances, up to 500 meters in open areas, with baud rate of 10kbps in the air2. One to One and One to Many: This module can support one to one and one to many transparent communication through ID settings3. Synchronous Change: Changing the baud rate of different serial ports will synchronously change the rate at which data is sent over the air4. Maximum Transmit Power: The maximum transmit power of this serial port is 100mW/20dBm, the power can be set to 10 levels, the port has built in MCU, can use this serial port to communicate with external devices5. Application: This module can be used for IP PTZ camera, LED controller, wireless instrument, identification system and etc.Spec:Item Type: Transceiver ModuleMaterial: ABS+PCBModel: RT38B01Working Voltage: 4.5V-5.5VInterface: RS485(5V GND A+ B-)Operating Frequency: 433MHz(up to 255 communication channels)Transmit Power: -40 to +20dBmReceive Sensitivity: -114dBmWorking Temperature: -25 to +75Transparent Transmission Mode Baud Rate: 1200, 2400, 4800, 9600(default), 19200Open Ground Transmission Distance: 500MApplication:For IP PTZ cameraFor R4D3C32 N4D8B08 N4D8C12 RS485 relayTemperature sensorLED controllerRemote control, telemetry systemWireless instrumentSmart home, home automationAccess controlSmart meterRecognition systemData collectionIT appliancesSmart appliancesBaby monitoring system,ThermometerHow to Use:Recommend to buy more than 2 pieces:1. For 2PCS, module 1 and module 2 send data to each other.2. For >=3PCS, one as master device, the other as slave device.The way they work is the same as wired RS485 bus: Master device transmit data, slave devices can all receive data, any slave device transmit data, master device and the other slave[Application] : This module can be used for IP PTZ camera, LED controller, wireless instrument, identification system and etc. This transceiver module can transmit wirelessly over long distances, up to 500 meters in open areas, with baud rate of 10kbps in the air[One to One and One to Many] : This module can support one to one and one to many transparent communication through ID settings, This module can be used for IP PTZ camera, LED controller, wireless instrument, identification system and etc.[Maximum Transmit Power] : The maximum transmit power of this serial port is 100mW/20dBm, the power can be set to 10 levels, the port has built in MCU, can use this serial port to communicate with external devices[Synchronous Change] : Changing the baud rate of different serial ports will synchronously change the rate at which data is sent over the air, This module can support one to one and one to many transparent communication through ID settings[Multi-Channel] : The module also supports multi-channel data transmission, allowing you to simultaneously send and receive data across multiple serial ports. This makes it ideal for applications requiring real-time communication over long distances.[Application] : This module can be used for IP PTZ camera, LED controller, wireless instrument, identification system and etc. This transceiver module can transmit wirelessly over long distances, up to 500 meters in open areas, with baud rate of 10kbps in the air[One to One and One to Many] : This module can support one to one and one to many transparent communication through ID settings, This module can be used for IP PTZ camera, LED controller, wireless instrument, identification system and etc.[Maximum Transmit Power] : The maximum transmit power of this serial port is 100mW/20dBm, the power can be set to 10 levels, the port has built in MCU, can use this serial port to communicate with external devices[Synchronous Change] : Changing the baud rate of different serial ports will synchronously change the rate at which data is sent over the air, This module can support one to one and one to many transparent communication through ID settings[Multi-Channel] : The module also supports multi-channel data transmission, allowing you to simultaneously send and receive data across multiple serial ports. This makes it ideal for applications requiring real-time communication over long distances.