Bluedio AS-BT (Air) Fashionable Dual Mode Sleek Stereo Wireless Bluetooth V4.1 Speakers Multi-Room Sharing Simulation 3D Home Family Speaker System Gift (Black) Distinctive and individualized appearanceJust like A, AS-BT also has youthful and fashionable personality. As a portable wireless Bluetooth speaker, AS-BT will bring you wonderful music, highlight your personality and make you become different. 52mm fiberglass speakersAS-BT has two 50mm fiberglass speakers which can sharply improve the low frequency performance and make the sound softer and clearer, so as to bring you a more comfortable listening experience. Rear double bass radiatorAS-BT adopts the rear double bass radiator which can effectively utilize the air in the cavity to restore the low frequency, not only to prevent the hum of air, but also to make the low frequency more powerful. Clearer and more stereo 3D sound effectBluedio has made a specific 3D sound adjustment for the new fiberglass speakers of AS-BT, which can improve the sound resolution and expand the sound field, to make the 3D sound clearer, more stereo and natural. Latest Bluetooth 4.1AS-BT adopts the latest Bluetooth 4.1, which makes the signal transmission more stable and faster. Besides, the lower power consumption enables the battery to last for a long time. While traveling outside, you can enjoy music without worries.