ITEM NAME:5Pcs CJMCU 5V Micro- USB Board Interface Power Switch Adapter Breakout ModulK5W4 5Pcs CJMCU 5V Micro- USB Board Interface Power Switch Adapter Breakout ModulK5W4 CJMCU Micro- USB power adapter. 5V power supply. Compact size, easy to install. Item Name: CJMCU Micro- USB Board Features: Compact, Durable, Easy to Use colour:blue Material:PC + metal size:Length: 10mm/0.39 inch Width: 25mm/0.98 inch(Approx.) Package Contents: 5 x CJMCU Micro- USB Board.CJMCU Micro- USB power adapter. 5 x CJMCU Micro- USB Board.