What is Bluetooth Classic?

Bluetooth Classic is a wireless technology standard for exchanging data over short distances (using short-wavelength UHF radio waves in the ISM band from 2.402 GHz to 2.48 GHz) from fixed and mobile devices, and building personal area networks (PANs). It is commonly used for audio streaming (e.g., connecting wireless headphones to a smartphone), data transfer (e.g., connecting a mouse or keyboard to a computer), and device communication (e.g., connecting a smartphone to a car's infotainment system).