Description: Screw shields Assembled prototype terminal expansion board for Arduino. Provide terminal for the Arduino IO, convenient port connection. With Proto shields, can be used as a prototype extension plate in the middle. Prototype extending double-sided PCB via links, positive sides can be welded components IO have SMT solder on the back, easy to fly line connection. Direct plug puzzle board, NO soldering needed. Package Includes: 1 Piecex Screw Shield Expansion Board