Speaker Defender Boomer 20 Bluetooth 5.0. The new standard doubles the data transfer speed, quadruples the range, and significantly reduces the energy consumption of this process compared to earlier versions of wireless communication modules. LED lighting. True Wireless Stereo (TWS) – the ability to connect two separate speakers to a 2.0 speaker system. Built-in FM receiver. Integrated MP3 player. Use a USB stick, SD, or Micro-SD card as a sound source. USB storage and MicroSD card slots. Microphone inputs. Additional AUX audio input. With the AUX input cable and the 3.5mm jack, the speakers can be connected to a computer, player, or mobile phone and used as speakers. Equalizer. Built-in phone stand. Convenient holder.