Compact portable Boss Marine MRBT200 speaker enveloped by thick water resistant rubber. Composed by perfectly set 3 active drivers and 2 passive radiators in order to cover perfectly all necessary audio frequencies and to grant a linear sound. With microphone, speakerphone function, Bluetooth and NFC pairing (Android) connections, AUX input. Complete with hooking shackle and lithium battery with 8 hours autonomy rechargeable with micro USB included cable.