ABC&reg; 2 in 1 MicroSDXC USB OTG Reader Adapter for Android Phone up to 128GB ABC is a registered trademark and the only authorized seller of abcsell branded products. Read / Write data from your smart phone to your micro SD /TF card. Backup photos and data from Micro SD /TF card onto your PC/smart phone Compliant with USB version 2.0 and USB 1.1. USB bus power supply. No external power supply required.