SODIAL USB 2.0 + USB mini OTG SD Card Reader Cell Phone Tablet PC Support for SD / T - Flash Card Transfer rate: USB2.0, 480Mb / s Operation Voltage: 2.7V - 3.6V DC USB port Dimensions: approx. 55 x 16 x 10 mm / 2.2 x 0.6 x 0.4 inches USB interface: mini USB / USB