Speaker Defender Boomer 20 Bluetooth 5.0 The standard increases the data transmission speed by a factor of two, the range by a factor of four and the energy consumption of this process is significantly lower than with earlier versions of wireless communication modules. LED illumination. True Wireless Stereo (TWS) - the ability to connect two separate speakers to a 2.0 speaker system. Integrated FM receiver. Integrated MP3 player. Use a USB stick, SD card or micro SD card as a sound source. USB memory and MicroSD card slots. Microphone connections. Additional AUX audio input. Using the AUX input cable and the 3.5 mm jack socket, the speakers can be connected to a computer, player or mobile phone and used as speakers. Equaliser. Integrated phone stand. Practical holder.