JBL extreme 4 features:

• Massive JBL Original Pro Sound: The JBL Xtreme 3 delivers powerful sound with deep bass and clear highs, thanks to its four drivers and two JBL Bass Radiators. This means you can enjoy your favorite music anywhere you go, whether you’re at the beach, the park, or just hanging out in your backyard.
• 15 Hours of Playtime: With up to 15 hours of battery life, the JBL Xtreme 3 can keep the party going all day and night. You won’t have to worry about your speaker running out of power in the middle of the fun.
• IP67 Waterproof and Dustproof: The JBL Xtreme 3 is IPX7 waterproof and dustproof, so you can take it with you to the pool, the beach, or anywhere else you go without worry. It can even be submerged in water for up to 1 meter for 30 minutes.
• PartyBoost: Want to create an even bigger sound experience? Connect multiple JBL PartyBoost-compatible speakers together to create a powerful sound system that will fill any room.
• Powerbank: The JBL Xtreme 3 has a built-in powerbank that can be used to charge your devices on the go. This is a great feature for keeping your smartphone or tablet charged up when you’re out and about.
• Convenient Carrying Strap: The JBL Xtreme 3 comes with a convenient carrying strap that makes it easy to take with you wherever you go.