Review on UGREEN Micro USB OTG Cable 2 Pack - Male to Female On-The-Go Adapter for Samsung, LG, DJI Spark, Mavic Remote Controller & Android Tablets - Black by Lequon Kaneshiro

I bought this to connect my Android 7.0 phone to a USB keyboard and flash drives. That works fine. The phone recognizes and activates the keyboard and its pointing device (Lenovo keyboard with joystick). It also opens my USB drives and allows me to upload My files, documents and photos. I haven't tried video or music files yet, but I don't see any reason why they won't work. It doesn't connect my Canon printer via USB, but I probably just need a printing app to support that since I only have cloud printing installed. The only quirk is that to power an unpowered USB keyboard, the micro USB end of this adapter must be connected to the phone and the USB-A end of the keyboard cable must be connected to the USB-A female port of this adapter. Reconnecting the keyboard adapter and another cable connected to the phone will not power the keyboard and therefore will not be recognized. I don't understand why this difference occurs, but it's not a problem for me. Overall it looks like a good product.