The Ultimate Ears by Logitech, Mini Boom Wireless speaker has Huge Sound: UE MINI BOOM is the small speaker that delivers unexpectedly bold, jaw-dropping sound with crystal clear highs and deep bass. Add a Second Speaker: Wirelessly connect two UE MINI BOOMs together in stereo via the UE MINI BOOM app to double up the awesomeness with even huger sound. Party Longer: The rechargeable lithium-ion battery pumps out up to 10 hours of party-driving beats. Better Wireless: Stream music from any Bluetooth enabled device from up to 50 ft.; 50% farther than most other Bluetooth speakers. Music Everywhere: It is the perfect companion for your on-the-go lifestyle-ultra-compact design, simple controls and a crystal-clear speakerphone.