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. This OTG cable has a Micro B male on one end and USB type A female on the other. The cable length is 4.5 inches and comes in black.