Portable Design: With its rechargeable built-in battery, this portable speaker can be used outdoors without a power outlet, playing music for up to 15 hours and recharging quickly with fast charging Get Ready to Party: Elevate any event by dancing to glowing lights and strobe effects, or easily connect your microphone, guitar or DJ console using the dual XLR inputs to sing and play along with friends Multi-Speaker Connection: Use Auracast to pair two PartyBox 520s for true stereo vibes or wirelessly connect multiple Auracast-enabled speakers to let your music grow with the party IPX4 Waterproof: Featuring an IPX4 splashproof design with an extendable ergonomic handle and sturdy wheels, this portable speaker moves easily and is great for the beach or park, resistant to light rain and splashes Real-Time Audio Magic: AI Sound Boost analyses your music in real time, enhancing acoustic performance with less distortion for powerful sound that truly makes your playlists shine