Enjoy fine-tuned sound with the S310 Superstar speaker. Built-in high efficiency battery provides over 16 hours of playtime. IPX5 Water resistant design is safe from splashes gentle sprays and rain. Connect additional S310 to create powerful stereo sound (NOT included). Bluetooth 5.0 provides 100ft wireless range. Built-in mic offers hands-free calls and speakerphone capability. True 360-degree Stereo sound with rich bass mids and highs. Convenient lanyard design offers easy portability.