This video overview of our ProXR Series 16-Channel Relay Board shows the hardware features available, including on-board 8/10-Bit Analog to Digital Converters (ADCs), XR Relay Expansion Port, and removable USB interface. Users may upgrade the modular USB Interface to Digi XBee wireless interface modules, including ZigBee 802.15.4, or other interface technologies, such as Ethernet, WiFi, Bluetooth, RS-232, and others.