“It's the official Raspberry Pi 3 power-supply, and it provides steady power to this model of the device. It's an essential purchase to go with the "Getting Started with Raspberry Pi" book that has a Raspberry Pi 3A+ as a cover-mount, too!”
“I was having issues with low power trying to use phone chargers and ipad chargers nothing would give me the correct results using IO sensors. Once I plugged this in it solved all my problems.”