Review on 🔌 iUniker Power Switch for Raspberry Pi 3, Pi 2, B+, Zero W - 4-Pack, Raspberry Pi Power Supply Cord with On/Off Push Switch, MicroUSB Female to Male Cable by Alan Lewis

Overall it's great! A very efficient way to toggle an existing Micro USB cable on and off. With more and more devices using this connector just for power, it's very convenient. However, there was one thing that surprised me. The switch is on when the button is in the OFF position and off when the button is pressed. This is totally illogical and it took me a while to figure out what was going on. This does not affect the operation of the switch, you just need to consciously think every time you turn the power on or off.