1. [IPX7 Waterproof] The speaker is IPX7 waterproof. With IPX7 protection level, this speaker is suitable and the outside. It can be used in rainy or wet rooms, such as in bathrooms, shower rooms, swimming pools, beaches, etc., or it can be immersed in water (less than half an hour).2. [With bracket and hook] The speaker is equipped with a movable bracket, which can be and safely installed on the bicycle. You can use the provided hook to hang the speaker on the backpack. comfortable to wear, suitable for outdoor activities, biking, hiking, climbing, camping, etc.3.[BLUETOOTH 5.0]Bluetooth 5.0 version can realize fast and stable connection. It can support stable connections within a working range of 10-15 meters. Enjoy the music without interruption.4. [10H long running time] Built-in 750mAh battery, after 2.5 hours of charging, you can enjoy 10 hours of uninterrupted music playback at 60% volume. Made of sturdy, high-quality materials, you can enjoy strong bass and stereo.5. [Built-in microphone] speaker has hands-free function. Not only can you listen to music or podcasts while driving, you can also chat with the built-in microphonecolour: blackMaterial: ABS+PUPackage contents: 1*speaker 1*bracket 1*charging cable1*audio cable