The Skullcandy Terrain provides a sound as bold as you. Take it to a pool party or have a chill game night at home, you're in charge of the vibe. Built in dual passive radioters for premium sound. IPX7 Wateroof means this speaker is able to withstand full immersion down to 3 feet for up to 30 minutes. It is a perfect indoor or outdoor everyday speaker. Multi-Link wireless connects up to 99 Skullcandy Speakers. Up to 14 hours of playback time and a three hour charge time.