JBL PartyBox 310 is a 240W wheeled party speaker with a built-in light show that throbs to the beat. Two 6.5-inch woofers and two 2.25-inch tweeters deliver chest-thumping bass and crisp highs, while a USB input, Bluetooth, mic and guitar inputs and karaoke effects make it a full event speaker. An 18-hour battery, transport handle and wheels keep it portable, and IPX4 splash resistance handles outdoor use.