The ARX-USBEXT functionally equivalent to the ARX-900-BOB but in a much smaller (2.5" x 1.5 "x .75") plastic case. Includes audio input/output connector (1/8"), and DC power input connector (5.5mm x 2.1mm) so that radio can be powered by external AC/DC wall adapter. It also includes USB interface for a laptop connection to the Network Management System application. The ARX-USBEXT includes a 5V to 12V BOOST CONVERTER to provide +12VDC power to the ARX-9xx radio so that no AC power is required. This particularly helpful during initial installation and network debugging. The ARX-USBEXT includes the AiRocks Pro Network Management Software. USB Extender is designed primarily for ARX-910 configuration and control. However, it is also compatible with the ARX-900.