I. Iconic JBL Pro Sound: Small Size, Massive ImpactThe JBL GO 4 represents the pinnacle of "Mini Speaker" engineering. JBL has managed to shrink its world-renowned "Two-Way" audio crossover technology into a handheld device, ensuring that every note is delivered with crystalline clarity.Extra Bass Mode: Despite its "1 Channel" mono-block design, the GO 4 features a specialized "Sound Mode" that emphasizes low-end frequencies. This "Extra Bass" ensures that high-energy tracks maintain their punch, making it the perfect "Subwoofer" alternative for those who need a portable beat.High-Efficiency Output: With an "Input Power <25 W," the speaker maximizes every milliwatt of energy, providing a rich, full-bodied soundstage that belies its "Music BRICS" nickname.Original Authenticity: As an "Original Authentic" JBL product from "Mainland China," you are guaranteed the signature tuning that has made JBL a staple in the global music industry.II. Ruggedized for Adventure: IP67 Waterproof & DustproofA "Portable" speaker is only as good as its durability. The GO 4 is engineered to thrive in environments where other electronics fail.Waterproof Excellence: This speaker is fully "Waterproof," meaning it can survive a dip in the pool or a sudden rainstorm at an "Outdoor Party."Dustproof Construction: The "Plastic" cabinet material is tightly sealed to prevent sand or dust from interfering with the internal "Loudspeaker Enclosure," making it a must-have for beach trips or hiking excursions.Authentic Durability: The specialized fabric wrap and rubberized accents provide a tactile grip and impact resistance, ensuring the "New" condition remains intact even after a rugged weekend of travel.III. Intelligent Connectivity & App IntegrationModern audio requires more than just a cable. The JBL GO 4 is a "Smart" audio device designed for the digital age.Bluetooth Wireless Freedom: Utilizing the latest "Bluetooth Communication" protocol, the GO 4 offers a stable, long-range connection with zero latency. You can control your playlist from across the yard during a "Birthday Party" without ever losing the signal.JBL Portable APP Support: This model features full "Support APP" functionality. By using the JBL app on your smartphone, you can customize the EQ settings, check your battery status, and receive over-the-air firmware updates to keep your speaker performing at its peak.Voice Control Ready: Seamlessly integrate with your smartphone's "Voice Control" features to skip tracks or adjust volume without reaching for the device.IV. Portable Power & "Music BRICS" DesignThe aesthetic of the GO 4 is a tribute to urban utility and modern "Home" decor.Compact Portability: Known as the "Music BRICS," the GO 4 features a squared-off, architectural design that fits perfectly in your palm or clips onto a backpack.USB Power Source: Charging is faster and more universal than ever with the integrated "USB Input/Output" port. This "Low Voltage" (below 75V DC) system ensures safe and efficient power delivery from any standard USB wall charger, power bank, or laptop.Inbox Adaptor Included: Unlike many competitors, this package includes the "Inbox Adaptor" and "USB Power Source" cable, ensuring you are ready to play the moment you unbox.V. Versatile Use: From Home to PartyThe JBL GO 4 is a "Category: Speaker" designed for every occasion.Home Office Enhancement: Its compact footprint makes it an ideal "Home" speaker for your desk, providing high-quality background music without occupying workspace.Event Ready: Whether it’s an "Outdoor Party" or an intimate "Birthday Party," the GO 4 can be linked with other compatible JBL speakers to create a wider soundstage.Safe Construction: With None high-concerned chemicals, the speaker is safe for use around children and pets, meeting rigorous global safety standards.Comprehensive Technical Specifications TableEngineering AttributeDetailed Specification & FeatureBrand NameJBL (Authentic Original)SeriesGO 4 "Music BRICS" PortableAudio CrossoverPrecision Two-Way DesignSound ModesExtra Bass / Standard ModeConnectivityWireless Bluetooth CommunicationPower SourceUSB (Low Voltage Safe <75V DC)Input PowerEnergy Efficient <25 WProtectionIP67 Waterproof and DustproofMaterialRugged Reinforced Plastic & FabricApp SupportJBL Portable App CompatibleVoice FeaturesVoice Control EnabledWeightUltra-Lightweight Mini SpeakerSpecial FeatureIntegrated Carry Loop for Portability JBL GO 4 Original Authentic Wireless Bluetooth Mini Speaker Music BRICS Portable Subwoofer for Outdoor Party Birthday Party Ultra-portable JBL Pro Sound with punchier bass: Don't let its little size fool you. The JBL Go 4 packs a serious musical punch. 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: Don't sweat the small stuff like charging your battery. JBL Go 4 gives you up to 7 hours of playtime on a single charge. Tap Playtime Boost to add up to 2 more hours to your battery life. 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. Made in part with recycled materials: The JBL Go 4 incorporates post-consumer recycled plastic and fabric for the speaker grille. It's also packaged in FSC-certified paper printed with soy ink.