16A 250V AC DPST ON-OFF Rocker Switch TF Card module the Arduino UNO form factor

the Arduino UNO form factor should allow you to use most of the shields available

Red are for the power supply and 3 wires to measure the Voltage and Current

Brand Hi-Link  Model number HLK-5M05 Input Voltage 100V-240V AC Output 5V

Twist & lock mechanism

16A 250V AC DPST ON-OFF Rocker Switch TF Card module the Arduino UNO form factorDPST (Double Pole Single Throw) Rocker switch is a 4 pin switch. DPST Rocker switch is very easy to use and install as it requires no screws or nut bolt for its installation. This switch has two positions i. e., ON and OFF. And it stays in its position until it is not pressed again to change its position. ON and OFF positions are clearly marked on the switch as O and I respectively to make it easy to identify the current position of the switch. This