The hidden USB card slot supports TF cards within 256GB. USB2.0 fast transfer up to 480Mbps, high-speed file transfer. The secure transmission is stable and uninterrupted without delay. The all-in-one TF card reader instantly becomes a U disk, and you are not afraid of losing your TF card when you go out. Mini design, more convenient to carry when going out. Name: TF card reader Transmission speed: USB2.0 Colour:silver Material:Zinc alloy Package Contents: 3 x Card Reader Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.