Check the listing for details. 50x USB TF Reader for MicroSD Micro SD to SD HC SDHC Adaptor Memory Card Adapter. Condition: New. Listed at 19.98 USD. EXTRA 10% OFF 3+ ITEMS Click and See all eligible items Limited Time OFFER!!! Every 2 of 50 USB Reader Adapters you buy, we gift you 1 of 50 USB Reader Adapters FREE!!! (Add 3 quantity to cart) You will pay for only 2 sets. Email us if the quantity is not enough. just connect your micro usb phone from male micro usb port and add the driver to female usb port,then you can send the files directly on your phone or tablets easily as a host. Allows you to connect devices,like flash drive,card reader,mouse or a keyboard to your Micro USB OTG capable tablet computer or Smartphone directly at speed up to 480Mbps,controlling your device with a mouse and keyboard. All in one,it offers a convenient way for quick and easy data reading and backup without host. No additional driver installation required.Card Compatibility: MICRO SD/SDXC/TF card.Fast transfer rate for reliable copy/download/backup.Powers via USB port, no additional power supply needed.Compatible for Windows ME,2000,XP,Vista,WIN 7 and Mac OS with USB interface.