Specifications:Package Weight: 12g / 0.42ozPackage Size: 12 * 7 * 0.6cm / 4.72 * 2.76 * 0.23in L * W * H) This is 2-in-1 expansion board. Positive side is SD slot and the other side is TF slot.Features:Positive side is SD slot and the other side is TF slot.It can be used with smart phones, PDA, MP3/4, digital cameras, GPS and tablets and such devices that equipped with MicroSD expansion slot.