JBL Go 4, Wireless Ultra Portable Bluetooth Speaker, Pro Sound, Water & Dust Proof, Type C Without Mic, Vibrant Colors Black About this item ✅ Ultra-portable JBL Pro Sound . The JBL Go 4 packs a serious musical punch, delivering big JBL Pro Sound with punchy bass. Your friends won’t believe how much great JBL Pro Sound comes out of such a small speaker ✅ Up to 7 hours of playtime plus 2 hours with Playtime Boost JBL Go 4 gives you up to 7 hours of playtime on a single charge. Simply tap Playtime Boost to prolong the playtime, adding up to 2 hours to your battery life. It tunes and optimizes the performance for louder and crisper sound. ✅ Waterproof and dustproof: The JBL Go 4’s IP67 waterproof and dustproof rating ensures this portable speaker can handle almost any environment, from a poolside party to a seaside picnic ✅ Multi-speaker connection by Auracast : Want even bigger JBL Pro Sound? Pair two Go4s for stereo sound, or wirelessly connect multiple JBL Auracast-enabled speakers using Auracast for even bigger sound ✅ JBL Portable app Use the JBL Portable app to receive updates, get product support, and unlock features, all straight from your phone. Fine-tune your sound with multiple EQ presets options. Or use the fully customizable equalizer to adjust highs, mids, and lows—so your music is just right for you