o) An enhancement to the Universal Serial Bus (USB) that enables portable devices to be cabled directly together (no computer required). OTG devices operate in "dual-role" mode and can be identified as either a host or a peripheral. When cabled to each other, an automatic negotiation makes one the host and the other a peripheral. Fully compliant as of USB 2.0, OTG devices began to ship in 2002.
Connected Via USB OTG
Used to detect objects behind walls, this Walabot 3D scanner becomes a peripheral device to an Android smartphone. The scanner's 10-pin Micro USB jack accepts Micro USB 2.0 and 3.0 plugs from the phone for power and connection to the Walabot app (see Micro USB