Product Name: 433MHz 868MHz Multifunctional Wireless RS485 Bus RF Serial Port UART Transceiver Module DTU for PTZ Camera Interface: RS485 Working Voltage: DC 5V Working Current: 5-40mA Transmit Power: -40 to +20dBm Frequency: 433MHz Receive Sensitivity: -114dBm Working Temperature: -25°C to +75°C Air-to-Ground Transmission Distance: 500m Dimensions (without antenna): 58.5 x 30 x 13.8mm Baud Rate in AT Mode: Fixed at 9600bps Transparent Transmission Mode Baud Rates: 1200, 2400, 4800, 9600 (default), 19200 Usage (with 2 pieces): - Two modules can send data to each other. Usage (with 3 pieces): - One module sends data, another acts as a repeater (multiple repeaters supported), and the third receives data, extending transmission distance. - One master module and two slave modules operate like a wired RS485 bus. The master sends data to both slaves, and any slave can send data back to the master and other slaves. Application: PTZ Camera, Modbus temperature sensor, LED Controller, RS485 Relay, Remote control and measurement systems, Wireless meter, Home Automation, Access control, Identification systems, Data collection, IT household appliances, Smart home devices, Baby monitoring systems Color: Green + Black Material: PCB Board + Electronic Components Package Contents: 2 x RS485 Wireless Transceiver Module (Other items not included) Note: Lighting and display differences may cause slight color variations between the image and the actual item. Measurement error allowed is +/- 1-3cm.