How does it compare with the JBL Flip or Charge?

The S320 costs far less and matches on waterproofing, but JBL models generally deliver deeper bass and better app support. Choose the S320 if budget and loudness matter most.

How long does the battery really last?

Monster claims up to 32 hours at medium volume. At high volume expect considerably less, so plan on charging more often for outdoor parties.

Can I pair two S320 speakers together?

Yes. True Wireless Stereo pairing links two units for 80W stereo output, which is the main reason to buy a second one.

Is it actually waterproof?

It carries an IPX7 rating, meaning it survives submersion in about a meter of water for up to 30 minutes. It is fine for showers and rain, but dry the port cover before charging.

The speaker, a charging cable and basic documentation. A 3.5mm aux cable is not guaranteed, so check before relying on the aux input.

Is the Monster S320 worth it?

It is a cheap way to get 40W and an IPX7 rating. Expect decent volume and toughness rather than deep bass or premium build.

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This hour's deals

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Tech · Walmart

Monster S320 Portable Bluetooth Speaker

Name: Monster S320 Portable Bluetooth Speaker
Brand: Monster
Availability: InStock

Deal score 7.1 · Great deal

$35.89$100.00 Walmart's regular price

You save $64.11 at Walmart

Deal.ai's agents found this deal on November 10. The store may have changed its price since.

Why it's a great deal

Walmart lists its regular price at $100.00: 64% off by its own figures
Rated 4.0 out of 5 by 43 buyers

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About it

Monster S320 Bluetooth speaker is designed and engineered by Noel Lee and the Monster Design Team in the USA. From 40 years of sound engineering fine-tuned to deliver the most impactful music experience possible, with 40W audio performance, 360° stereo sound effect, truly enjoy the surround sound of the cinema, a truly unparalleled listening experience.

From Walmart

40W audio with 360° stereo sound effect, engineered by Noel Lee and the Monster Design Team
Bluetooth 5.0 with True Wireless Stereo (TWS) pairing of two speakers for 80W stereo surround sound
IPX7 waterproof rating: waterproof, shockproof and splash-proof
Endures rain, snow, dust, mud, sand and submersion; suited to outdoor or shower use
Rich bass, clear mids and vibrant highs for an immersive 360° sound
Up to 32 hours of continuous playing time at medium volume from a full charge

Returns: Free holiday returns until Jan 31
Shipping: Free shipping; arrives tomorrow when ordered within the stated window, shipped to Sacramento 95829

Specs

Outdoor: Yes
Frequency Response: 140 MHz
Bluetooth: Bluetooth, Yes
Connectivity Technology: Bluetooth
Ports And Interfaces: 3.5mm aux input
Wi-Fi: No
Assistant Support: No voice assistant functionality
Smart Functions: Dual-device connectivity
Speaker Placement: Portable
Audio Configuration: 360-degree design

About the Monster S320 Portable Bluetooth Speaker

The Monster S320 is a small, rugged Bluetooth speaker with a 40W dual-driver setup and a 360-degree omnidirectional design. It pairs two units for 80W stereo, carries an IPX7 waterproof and shockproof rating, and Monster claims up to 32 hours of playtime at medium volume. It sits at the budget end of rugged portable speakers, trading the deeper bass and app support of JBL and similar brands for loudness and toughness.

Best forShower and poolside listeningCamping and beach tripsBuyers who want loud sound on a small budgetPairing two units for a wider stereo setup

Pros

40W output from dual 2-inch drivers is high for this size and price
IPX7 rating covers rain, splashes and brief submersion
Shockproof build suits outdoor and rough handling
TWS pairing turns two S320s into an 80W stereo pair
Dual-device Bluetooth lets two phones connect at once
Light at 720 g and small enough to carry one-handed

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