Feature: 1. CONDUCIVE TO THE MINIATURIZATION: Come with high wiring density, small size and light weight, which is conducive to the miniaturization of electronic equipment 2. STRONG PENETRATING POWER: Possess strong penetrating power, strong signal stability, transmission distance up to 500meter 3. A VARIETY OF MODES: There are a variety of modes for you to choose from, easy to use, very convenient 4. ‑40~+20dBm TRANSMITTING POWER: Using RS485 interface, transmitting power from ‑40~+20dBm, receiving sensitivity is ‑114dBm 5. GOOD QUALITY PCB MATERIALS: Good quality PCB materials have reliability and miniaturization, good maintenance and interchangeability Specification: Item Type: Master Slave Network Transceiver Product Material: PCB Product Model: RT18A01 Working Voltage: 5V Working Current: 6-40mA Interface: RS485 Transmitting Power: -40~+20dBm Receiving Sensitivity: -114dBm Working Temperature: -25~75℃ Transmission Distance: Approx. 500meter / 1640.4ft. Package List: 1 x Transceiver 1 x Antenna Note: Please do not exceed the working voltage, otherwise will break down the circuit board.