Specifications: 1. Interface: USB 3.1 type , TF card slot 2. : Black ,white 3. Material: ABS 4. Dimension: 3.5*2*1cm Features: 1. TF card OTG reader for mobile phones and tablets to transfer data conveniently. 2. Compatible with USB3.1 type- port products, such as for MacBook/ air/ Pro,Nokia N1 Tablet, Pro 5, 2, 1 pro, Zuk Z1. 3. readwrite Micro SD cards.(Micro SD cards not included). 4. No driver needed for type- products. 5. Android and for os. 6. The LED indicator light will be blue when it works. Package included: 1 x USB 3.1 Type- to TF Card Reader Adapter (TF card not included) a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a