Working voltage: 4.8V-9V(2A Power Supply is Recommended) Interface: RS485 Frequency: 868MHz Transmit power: -40-+20dBm Receiver sensitivity: -114dBm Operating temperature: -25℃-+75℃ Transparent transmission mode baud rate: 1200 2400,4800,9600(Default),19200,38400,57600,115200 Open ground Transmission distance: 500M Application: Wireless Meter Reading Industrial Control Wireless Sensor Network Telemetry Equipment PTZ Camera Modbus modbus temperature sensor LED Controller RS485/RS232 Relay Remote control, remote measurement system Wireless meter Smart Home,Home Automation ,Wiser Home Access control Identification system Data collection IT household appliance Intelligence household appliance Baby monitoring system Thermometer Due to different production batches, there are differences in printing/appearance, which does not affect use. Colour:As Shown Material:Plastic Package Contents: 2 x Wireless Transceiver Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.