GadKo USB OTG Adapter, OTG USB Micro B Male to USB Type A Female, USB On The Go GadKo is the only authorized dealer of GadKo branded products. This adapter can be used with many micro B phones and tablets; basically adding a USB port. OTG stands for On-the-Go; meaning this plug is ultra-portable and can be used anywhere. This device will allow the tablet or phone to hook up to a mouse; keyboard; flash drive or an external hard-drive by a standard USB connection. Some of the more popular phones that are compatible with this adapter include: Google Nexus 5; Samsung Galaxy and the Note.