CHIPSEN RCPORT RS232 and RS422/485 Serial to Bluetooth devices use Class 1 Long Range (+20dBm) Bluetooth Modules integrated into plug-and-play devices that are quick to set up, easy to use, and provide an unobstructed range of 1000 feet with the antenna provided, or up to 4000 feet with other optional antennas. With two or more of these adapters, you can replace the serial cables used to interconnect multiple pieces of hardware with wireless Bluetooth connections. These devices provide 1:1 Auto-Pairing, 1:1 Node-Switching, and 1:7 Multi-Connection providing selectable or simultaneous communications between a Master and up to 7 Slaves. The Slaves and Master can be quickly configured and paired with the RCPORT-TD400 Manager software, included at no charge, and operate with Android, IOS, Windows and Linux. Models include RS232 to Bluetooth adapters with USB-A connectors, perfect for use with a PC, and with DSUB9 Female connectors for industrial, lab, test and manufacturing equipment. An RS422/485 to Bluetooth adapter with a DSUB9 Male connector is also available.