**Product Specifications:**
**Brand:** JBL
**Model:** GO4
**Features:**
- Legendary sound quality from 78 years of professional audio technology accumulation by Harman acoustic team
- AURACAST technology for wireless pairing of two or more compatible JBL speakers
- IP67 dust and water resistance for versatile indoor and outdoor use
- USB Type-C charging for 7 hours of continuous playback
- Bluetooth 5.3 for stable and efficient wireless transmission
- PROSOUND with a frequency response range of 90Hz-20kHz
- Customizable EQ settings and PLAYTIMEBOOST mode via the JBL Portable app
- Scene-specific sound modes for travel, outdoor activities, and office leisure
**Technical Specifications:**
- Transducer: 45mm/1.75"
- Output power: 4.2W RMS
- Frequency response: 90Hz-20kHz
- Signal-to-noise ratio: >85dB
- Battery type: Lithium-ion 3.23Wh (equivalent to 3.8V/850mAh)
- Battery charging time: <3 hours (5V/3A)
- Music playback time: Up to 7 hours (depending on volume and audio content)
- Bluetooth version: 5.3
- Bluetooth transmitter frequency range: 2400MHz-2483.5MHz
- Bluetooth transmitter power: ≤9dBm (EIRP)
- Product dimensions: 94.3×75.7×42.2mm/3.7"×3.0"×1.7"
- Product weight: 0.19kg/0.42lbs
- Packaging dimensions: 125×103×56.5mm/4.9"×4.0"×2.2"
- Maximum operating temperature: 45°C
**Q&A:**
- Automatic shutdown feature after 10-30 minutes of inactivity
- Compatible with standard USB charging heads
- Actual usage time may vary based on environmental factors and audio settings
- Can be used while charging, but charging time may be longer
- Potential audio issues during Bluetooth playback may be influenced by environmental factors and device interference
JBL GO4, with its rich heritage in professional audio technology, offers a blend of legendary sound quality, durable design, and versatile functionality, making it an ideal choice for various lifestyle and leisure scenarios.
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