WR-7 Mini Bluetooth speaker with FM radio is small enough to fit in your hand, loud enough to fill your room with sound. The WR-7 achieves lower distortion and clearer sound with its acoustic suspension speaker system that includes a 40mm full range speaker with a passive subwoofer. Its tuned cabinet provides excellent bass response and circuit optimization is designed for exceptional sound quality. An automatic switching dual mode amplifier provides better FM reception in class AB mode