Hands-Free Calling - You can receive incoming calls through this speakerphone as it has a built-in microphone that delivers clear sound quality. When the call is over, the song will resume automatically, without you having to do it externally. 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 impressive bass and perfect treble. It also comes with stereo surround sound, so you can watch movies in a cinema setting. IPX4 Waterproof - 100% waterproof and splash-proof speaker, combined with anti-scratch technology. - IP67 breaking, the latest IPX4 waterproof rating, the single product carabiner is suitable for any scene, whether it's 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 device on the which Bluetooth is on. It is compatible with devices such as iPhone, iPod, Android phones, MP3 players and many more. It has strong connectivity for clear, 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 the music.