bluetooth 5.0 provides greater wireless range 65ft and great connection to any Bluetooth devices like iPhone, android mobile phone, iPod, tablet, PC. Built-in Bluetooth amplifier with stereo surround sound can connect normally under hard conditions and the signal is not disturbed. Rated of IP66, speakers are made with heavy-duty ABS construction and are marine grade waterproof making them to use in any open places. Excellent for use with foam machine