Class 1 Div 2 approved, they offer connectivity to Bluetooth-enabled devices such as PDAs, PCs or other PSI-WL devices. The PSI-WL-RS232-RS485/BT is a DIN-rail mount package that interfaces to RS-232/422/485 electrical formats. Modbus and additional industrial protocols are also supported. It features software-adjustable transmit power to extend the Bluetooth reach up to 300 feet. The PSI-WL-RS232-RS485/BT can be used as a simple wire and cable replacement in point-to-point applications or in point-to-multipoint configurations. One master will support up to seven slave devices.