Hands-Free Calling - Receive incoming calls through this speaker, which features a built-in microphone for clear sound quality. Surround Sound Quality - Enjoy a powerful combination of stereo sound and enhanced bass, delivered through an optimized sound chamber structure for rich bass and crisp treble. Experience immersive stereo surround sound, ideal for watching movies with a theater-like audio effect. IPX4 Waterproof - This speaker is waterproof and splashproof, rated IPX4, making it resistant to water from any direction. Perfect for use in wet environments such as bathrooms, by the pool, at the beach, or during outdoor activities like camping, cycling, and fishing. Bluetooth Connectivity and Strong Compatibility - Connect wirelessly via Bluetooth to a wide range of devices, including iPhones, Android phones, tablets, MP3 players, and more. Enjoy stable connectivity for clear, uninterrupted audio playback. Rechargeable Battery - Equipped with a built-in rechargeable battery, the speaker can be charged via USB. Playtime ranges from 2 to 4 hours on a full charge, depending on volume level and usage.