JBL Go 4 Bluetooth Wireless Speaker Purple

• Sound: ultra-portable speaker with JBL Pro Sound and punchier bass; 45 mm driver, 4.2 W RMS, 90 Hz–20 kHz.
• Battery: up to 7 hours + ≈2 hours via Playtime Boost.
• Durability: IP67 dust/waterproof.
• Connectivity: Bluetooth 5.3; A2DP 1.4, AVRCP 1.6.
• Extras: Auracast multi-speaker (incl. stereo pair), JBL Portable app with EQ and updates.
• Size & weight: 94.3 × 75.7 × 42.2 mm, 190 g.
• Charging: USB-C, ~3 hours (5 V, 1 A).

Quick comparison: versus JBL Go 3, the Go 4 sounds fuller, adds the app with EQ and Auracast multi-connect, and runs a bit longer. Go 3 stays the tiniest/cheapest pick, but Go 4 is more feature-rich.