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 2pcs): - Two modules can send data to each other. Usage (with 3pcs): - Module 1 sends data, Module 2 acts as a repeater (multiple repeaters supported), Module 3 receives data; extends transmission distance. - One master module and two slave modules operate like a wired RS485 bus. The master sends data to all slaves. Any slave can send data, which is received by the master and other slaves. Supports multi-point communication. Applications: PTZ Camera, Modbus temperature sensor, LED Controller, RS485 Relay, Remote control and measurement systems, Wireless meter, Home Automation, Smart Home, Access Control, Identification Systems, Data Collection, IT Household Appliances, Intelligent Appliances, Baby Monitoring Systems Color: Green + Black Material: PCB Board + Electronic Components Package Contents: 2 x RS485 Wireless Transceiver Modules Note: - The package includes only the items listed above. - Light and display settings may cause slight color variations between the image and the actual product. - Measurement error allowance: +/- 1-3cm.