Bluetooth speakers continue improving thanks to modern technology. The battery-powered transistor radios of years ago were a precursor to the digital speakers that offer more features of interest to a new generation of consumers.
Bluetooth wireless connectivity that is paired (pre-associated) with one or more smartphones, tablets, iPods or computers.It then decompresses, decodes and amplifies the audio through the built-in speakers. See Bluetooth audio and Bluetooth pairing. Bluetooth speakers have become popular as companion devices to smartphones and tablets. By pushing a button, these units can be "paired" — connected by short-range link - with a Bluetooth-enabled host device through which audio playback or streaming can start.