Type: TF Card Adapter Compatible With: For 3B+, 3B, 2B Feature Install dual TF card, support 2 system for aboard. Suitable for mostly case which has a TF card slot. Double -TF card slot board for a dual system, design for players who need frequent task-switching between two . for example, change Raspbain OS to OS. Plug and play with a - switch to switching the system of changing 2 different -TF card, simplify your operation Compatible with 3 Model B / 2B / / W. Note: Please turn off your power, then change the system, switch when power on will damage your system in the TF Card. and High Material: PC+Metal Color as shown Package Contents: 1 x Dual TF Card Adapter Only the above package content, other are not included. Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.