Anker Soundcore Select 4 Go Bluetooth speaker with Bass - Black.

The Anker Soundcore Select 4 Go is a compact, ultra-portable Bluetooth speaker known for its durability, long battery life, and surprisingly punchy sound for its size, making it ideal for outdoor use. It features an IP67 waterproof and dustproof rating and can even float on water. 

Key Features

• Sound Output: Despite its compact size, it delivers a 5W power output and features BassUp™ technology for enhanced bass. Reviewers note that while the low-bass thump is minimal due to its size, the mid-range and treble are well-balanced, and the sound quality is good for its price point.
• Durability: It has a high IP67 rating, meaning it is fully protected against dust and can be immersed in up to 1 meter (3.3 ft) of water for 30 minutes, making it highly suitable for beach, pool, and shower use. It also floats.
• Battery Life: The speaker offers up to 20 hours of playtime on a single charge, which is a key highlight compared to similar budget speakers. A full charge takes approximately 4.5 hours via its USB-C port.
• Portability: It is lightweight (around 265g) and includes a built-in strap/loop, making it easy to carry or attach to a backpack for hiking or biking.
• Connectivity: It uses Bluetooth 5.4 (some versions use 5.3) and supports True Wireless Stereo (TWS) pairing, allowing two Select 4 Go speakers to be connected for an immersive, stereo sound experience. It does not have an AUX input or a built-in microphone.
• Customization: Users can fine-tune the audio with a customizable 9-band graphic EQ and adjust other settings (like auto power-off) via the Soundcore app. 

User & Expert Opinions

Reviewers generally consider the Anker Soundcore Select 4 Go to be an excellent value for a budget portable speaker. 

• Pros: Users praise its surprising sound quality and volume for its small size, rugged durability, impressive battery life, and the useful customization options available through the app. The ability to pair two units for stereo sound is also a popular feature.
• Cons: As expected from a speaker of this size and price, it lacks deep bass thump. Some minor build quality concerns were noted, such as the potential for the small rubber feet to wear down