2 of this product will automatically match each other within 10 meters, and 1 electronic eqquipment can link to 2 products in order to achieve better stereo sound effect. The Bluetooth speaker supports Bluetooth Connection, 3.5mm aux cable and high capacity 32G TF card.You can enjoy music for multiple connection ways. Experience your music in full-bodied stereo realized through high-performance drivers. With 600mAh battery capacity, it can play continuously up to 6 hours.