Dual Stereo Pairing: Portable Bluetooth speaker has shocking rich bass, large volume without voice break. Two speakers connect wirelessly combined to high-quality speaker 360° all around sound effect. High-frequency is transparent and bright sound, medium-frequency is clear and clean and low-frequency reaches pretty low but powerfull with a full sound. It offers a rich sound and an enhanced bass that goes far beyond its size.Powerful Battery Life up to 20 Hours: Small in size but large in capacity. Let your enjoy music without being uninterrupted from day to night.Meet your needs throughout the day. Playing at 40% volume when fully charged can bring you a 20-hour uninterrupted music journey.Bluetooth 5.0 & Wireless Stereo Pairing: A new generation of Bluetooth 5.0 technology, transmitted by A2DP technology, has lower power consumption than Bluetooth 4.2 but with faster transmission,stronger anti-interference ability and more stable signal without any delay. Two Wireless Speakers can be paired for true wireless Bluetooth playback on the left and right channels of the two Bluetooth speakers.IPX7 Waterproof and Ultra-Portable Design: Waterproof Bluetooth speaker provides strong IPX67 waterproof protection. Mini speaker can resist to water, rain and splash, even float on your bathtub or pool, allowing you to enjoy music in a variety of different environments. Portable bluetooth speaker built-in hook with a carabiner so you can hang the portable speaker on backpack, bicycles, carts and anywhere you like, so it’s perfect for travel, riding, hiking, camping.USB Type C and Carabiner: USB Type C charging cable provides quicker charging. You can use your phone cable to charge, no need to carry extra. High Quality Metal Carabiner Used for daily life, attached the speaker to the backpack or handbag.