Portable amplifier system with integrated Bluetooth receiver for wireless connection of portable audio players and adjustable USB/SD card player with connection for external storage media that is perfect for mobile applications such as sales events, lectures or outdoor performances. It offers operation via mains connection or built-in lead gel battery 12 V/7.2 Ah (operating time: up to 6 hours) with integrated automatic battery charging. It is equipped with a 2-way speaker system and provides an adjustable balanced microphone input via XLR, an adjustable microphone input via 6.3 mm mono jack and an adjustable CD/Tape input via RCA, plus an adjustable master output with 3-way equalizer and link connection (6.3 mm jack) for combining several systems. The system’s cabinet features a flight case design and features folding handles and stand sleeve. Due to integrated extractable telescopic handle and 2 castors, it can be easily be like a trolley. Power rating: 15 W RMS. Frequency range: 70 Hz-20 kHz. Dimensions: 410 x 470 x 310 mm. Weight: 17.2 kg.