Features: brand new and high quality 2 in 1 TF/SD memory card adapter board, support 2 System for a board. Double micro TF card slot board for raspberry pi dual system, design for players who need frequent task-switching between two systems. for example, change Raspbain OS to Ubuntu OS. Plug and for play with micro slide switch to switching the system instead of changing 2 different micro TF card, simplifies your operation for Raspberry Pi 3 Model B/ 2B/Pi Zero /Zero for W Suitable for mostly for case which has tf card slot Specifications: Model Number: Dual Micro SD/TF Card Storage Module Application: Computer Operating Temperature: -20 -65 Quantity: 1 pc Install Dual: TF Card Support: 2 System for A Board Suitable for: Mostly for Case which has TF Card Slot. Note: Due to the problems of lighting effects and shooting angles, there will be certain tolerances in the product, please understand. Please allow 0-1cm error due to the manual measurment. Please turn off your Raspberry Pi power, then change the system, switch when power on will damage your system in the TF Card. Package includes: 1 x TF Card Adapter