RIENOK Bluetooth Speaker 40W, 5200mAh portable speaker

This portable Bluetooth speaker from RIENOK delivers room-filling sound with an emphasis on punchy bass and versatile outdoor use, making it suitable for garden gatherings, travel and casual home listening. With a 40W output and an internal 5200mAh battery, it aims to combine loud, clear audio with long playtime for parties or extended listening sessions.

Key Points

The speaker uses a dual-driver layout with a 31 mm tweeter and a 50 x 90 mm mid-low driver to offer clearer highs and richer mid-bass response. Stereo pairing with a second unit of the same model is supported, allowing a wider soundstage for music and films. It features Bluetooth 5.3 for wireless connection, plus AUX and TF card playback for non-Bluetooth sources. The RGB side lights change with the music, adding visual flair to social settings. Rated IPX7, the enclosure is waterproof according to the manufacturer, which makes it suitable for poolside use and showers. Battery life is specified at up to 30 hours, although real-world time will vary with volume, light effects and type of audio played.

Technical Specifications

• Name: RIENOK S4 Max
• Power: - 40W output.
• Battery capacity: - 5200mAh, up to 30 hours playtime (manufacturer figure).
• Drivers: - 31 mm tweeter and 50 x 90 mm mid-low driver.
• Connectivity: - Bluetooth 5.3, AUX input, TF card slot (supports up to 32 GB, FAT/FAT32).
• Protection: - IPX7 waterproof rating.

Advantages

Sound emphasis is placed on bass, so the speaker can deliver a satisfying low end at moderate listening levels while keeping treble clear through the dedicated tweeter. The long battery and multiple connection options mean the unit can function independently of a phone for playlists stored on a TF card, and wired sources can be used when Bluetooth is not available. The RGB lighting creates a more festive atmosphere during social events.

Usage Recommendations

For best results outdoors, place the speaker on a stable surface and keep the tweeter roughly at ear height when possible to improve clarity. When pairing two speakers for stereo, ensure both are the same RIENOK model to enable correct stereo separation. Consider lowering the lighting effects to conserve battery if you need maximum playtime during lengthy outings. Note that waterproofing protects against immersion and splashes according to the IPX7 rating, however prolonged exposure to sand or heavy impact should be avoided to preserve the enclosure and controls.