JBL Go 4 Mono portable speaker Blue 4.2 W

The JBL Go 4 Blue is a compact mono portable speaker that delivers clear audio for everyday mobile use. Designed for on-the-go listening, it combines a small form factor with wireless Bluetooth connectivity and a built-in rechargeable battery. The speaker provides a rated output of 4.2 W, a wide frequency range from 90 to 20,000 Hz and a signal-to-noise ratio of 85 dB, making it suitable for voice, podcasts and background music from phones and smartphones.

Advantages

The speaker’s compact size and 0.19 kg weight make it highly portable and easy to carry in a bag or pocket. Bluetooth wireless connectivity supports common streaming profiles for straightforward pairing with mobile phones and other devices. Physical buttons for volume control provide simple, tactile operation without relying on a phone. The integrated 850 mAh lithium-ion battery allows for cordless use, and the mono design delivers consistent, focused sound for personal listening situations.

Suitable for

• Listening to music and podcasts on a mobile phone or smartphone
• Small gatherings and outdoor activities where compact portable sound is needed
• Hands-free voice playback for calls or voice assistants
• Use as a travel or personal desk speaker

Key specifications

• Speaker configuration: mono, 1 speaker
• Rated output power: 4.2 W
• Frequency response: 90 – 20,000 Hz
• Signal-to-noise ratio: 85 dB
• Wireless connectivity: Bluetooth (2.4 – 2.4835 GHz), A2DP, AVRCP
• Battery: built-in lithium-ion, 850 mAh
• Control: physical buttons for volume
• Weight: 0.19 kg
• Color: Blue

How to use

Charge the speaker fully before first use using the provided charging cable. Activate Bluetooth on your mobile phone or smartphone and select the JBL Go 4 from the list of available devices to pair. Use the physical volume buttons on the speaker to adjust playback level. Place the speaker on a stable surface and keep it within the Bluetooth range of the source device (typical 2.4–2.4835 GHz operating band) for uninterrupted audio streaming. Recharge the battery when needed and avoid exposing the unit to excessive moisture or extreme temperatures.

Recommendations

For best audio clarity, position the speaker on a flat surface at ear level when possible, and avoid placing it inside closed compartments. Regularly charge the lithium-ion battery and disconnect from the charger once fully charged to prolong battery life. Use within the recommended Bluetooth range and maintain up-to-date firmware if updates are available.