Features: Duplex communication support: It can send and receive data at the same time, improving communication efficiency, and is suitable for multiple users to use at the same time. High-performances Antennas: Equipped with 443 Antennas, which significantly enhances signal receiving and transmission ability and expands communication ranges. Multiple protocol compatibility: Support many digital voice protocols to meet the needs of different users. Modular design: Easy to install and disassemble, convenient for users to adjust and upgraded according to specific needs. Powerful processor: Equipped with high performances processing unit to ensure fast and stable signal processing. Specifications: Component:Plastic Size:Approx.65x55mm/2.17x2.56inch Package Includes: 1 Set Communication Board note: 1.Please allow 1-2cm errors due to manual measurement, making sure that you not mind before order. 2.Due to the differences between different monitors, the picture may not reflect the actual of the item.