GO4" most commonly refers to the JBL Go 4 portable Bluetooth speaker, known for its ultra-compact size, IP67 waterproof/dustproof rating, Auracast multi-speaker connectivity, up to 7 hours of playtime (plus 2 with Boost), and JBL Pro Sound with a redesigned loop for carrying, running Bluetooth 5.3 and USB-C charging. Key specs include 4.2W output, 90Hz-20kHz frequency response, and a 45mm driver, all in a 0.19 kg package.
JBL Go 4 (Bluetooth Speaker) Key Specs: Audio: JBL Pro Sound, 4.2W RMS output, 90 Hz – 20 kHz frequency response, Mono sound. Connectivity: Bluetooth 5.3, Auracast™ for multi-speaker pairing, USB Type-C. Battery: Up to 7 hrs (more with Boost), 3-hour charge time. Durability: IP67 waterproof & dustproof. Design: Ultra-portable, redesigned loop, made with recycled materials, no mic for calls. Dimensions & Weight: ~9.4 x 7.8 x 4.2 cm, 0.19 kg (0.42 lbs).
