It looks like the outline of a computer chip of some sort. It is mostly square, but on the left corner it's straight. There are then lines going around the inside that meet at a smaller square in the middle.
This is a RFID Tag icon. We've made it in iOS style
, first introduced in iOS version 7 and supported in all later releases up until now (at least iOS 11). This style is based on thin two-pixel lines and is optimized for 50x50 px. Unlike other vector icon packs that have merely hundreds of icons, this icon pack contains 13,700 icons, all in the same style and quality.