Card Reader - TOOGOO(R)USB 2.0 + USB Micro OTG SD ST Card Reader for Cell Phone Tablet PC (Blue) Dimensions: approx. 55 x 16 x 10 mm / 2.2 x 0.6 x 0.4 inches Operation Voltage: 2.7V - 3.6V DC USB port Transfer rate: USB2.0, 480Mb / s Read and write flash LED light USB interface: Micro USB / USB