It's a logo for Bluetooth 2. There is a very rounded rectangle surrounding a B made up of triangles with two lines at a 90 degree angle coming out behind the center of the B.
This is a Bluetooth 2 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 13,900 icons, all in the same style and quality.