2pcs DC jack female12V DC female & Female Power Balun plug Connector 5.5*2.1 DC Jack Connector CCTV Camera 2 pin Screw Terminal for pcb breadboard arduino uno mega nano due pro mini micro raspberry pi 2 3 4 powermav electronics

If you need to connect a DC power wall wart to a board that doesn't have a DC jack - this adapter will come in very handy! There is a 2.1mm DC jack on one end, and a screw terminal block on the other. The terminals are labeled with positive/negative assuming a positive-tip configuration (which is the most common) DC JACK F When the Mini Thermal Printer connect the power adapter with itself connect adapter, it need power the printer using a 5V to 12V 1.5A or higher power supply, such as wiring up a 5.5/2.1mm DC power.