HD 360 Surround Sound: The portable bluetooth speaker has shocking rich bass, large volume without voice pause, 360 sound effect. Equipped with 10W high quality speaker. Smooth and flexible appearance gives you a great visual experience. High frequencies are transparent and bright, mid frequencies are clear and crisp, and low frequencies reach quite low but powerful with full sound. It delivers rich sound and enhanced bass that goes far beyond its size. Powerful Battery Life Up to 24 Hours: Small in size but big in capacity. Enjoy music uninterrupted day or night. Meets your needs throughout the day. Playing at 40% volume when fully charged can bring you 24-hour uninterrupted music journey. IPX7 Waterproof & Anti-Damage Protection: IPX7 protection protects against rain, dust, snow and splashes. You can enjoy music in swimming pool, beach, bathroom and other places. It is also shockproof and anti-damage. Even if the Bluetooth speaker falls 1.5m high, it can still remain intact. Bluetooth 5.0 Wireless Stereo Pairing: A new generation of Bluetooth 5.0 technology, transmitted by technology A2DP, has lower power consumption than Bluetooth 4.2, but with faster transmission, stronger anti-interference ability and more stable signal without any delay. Two M7 wireless speakers can be paired for true wireless Bluetooth playback on the left and right channels of both M7 Bluetooth speakers.