Hands-Free Calling - You can receive incoming calls through this speaker as it has a built-in microphone which provides clear sound quality. external.Surround Sound Quality - The speaker has a special combination of stereo sound and bass effect which is a distinct sound chamber structure that gives you awesome bass and perfect treble. It also comes with stereo surround sound, so you can watch movies in a movie theater setting.IPX4 Waterproof - 100% waterproof and splashproof speaker, combined with IP67 anti-break technology, the latest IPX4 waterproof rating, the unique product carabiner is suitable for any scene, whether it is a bathroom, beach camping, swimming pool, fishing, cycling, or even diving, don't worry, the highest level of waterproof water system can prevent water from leaking from any angle.Bluetooth Connectivity and Strong Compatibility - The ultra-portable speaker can be connected to any Bluetooth-enabled device. It is compatible with devices such as iPhone, iPod, Android phones, MP3 players and many more. It has strong connectivity for clear and uninterrupted sound.Rechargeable Battery - This speaker has a built-in rechargeable battery that can be charged using a USB cable. The playtime of this speaker is 2-4 hours when fully charged, depending on the volume level at which you play music.