Is the S310 worth $29.89?

At $29.89 at Walmart as of November 3, 2026, it is a low-cost way to get 30W, IPX6 and Bluetooth 5.2. Expect budget sound quality, not hi-fi. It is a fair buy if loud outdoor audio matters more than refinement.

How long does the battery really last?

The spec sheet says 32 hours, but the Walmart listing says up to 24 hours at appropriate volume. Treat 24 hours as the realistic ceiling and expect less at high volume.

Can I pair two S310 speakers together?

Yes. True Wireless Stereo pairing links two S310 units for up to 60W and a wider stereo image. You need two speakers, sold separately.

Is it waterproof enough for the pool?

It is IPX6, which handles splashes, rain and gentle sprays. Do not submerge it or leave it floating in the pool; for that you need an IPX7-rated speaker.

What comes in the box?

Expect the speaker, a charging cable and basic documentation. A charging adapter and carry case are not typically included at this price.

The only price recorded since October 31, 2026 is $29.89 at Walmart, so there is no lower recent price to wait for. Watch for seasonal sales if you are not in a hurry.

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Monster Superstar S310 Portable Bluetooth Speaker

−63%

Tech · Walmart

Pocket-sized party starter from Monster

Name: Monster Superstar S310 Portable Bluetooth Speaker
Brand: Monster
Price: 29.89 USD
Availability: InStock
Rating: 3.8 (33 reviews)

Monster Superstar S310 Portable Bluetooth Speaker

A portable Bluetooth speaker that throws sound well beyond its size — great for picnics, patios and dorm rooms.

Deal score 7.0 · Great deal

$29.89$79.99 Walmart's regular price

You save $50.10 at Walmart

Checking it's still available…

Why it's a great deal

Walmart lists its regular price at $79.99: 63% off by its own figures

Visit Walmart

Every store we checked

WalmartNew
In stockSold by MCT Direct
$29.89Observed at 6:32 AM
Visit store
eBayPre-owned
Availability unknownSold by funtimesahead (100% positive, 62 ratings)Returns: Set by the eBay seller; the eBay Money Back Guarantee covers an item that doesn't arrive or isn't as described.
$19.50+ $10.15 shippingVerified
Visit store
eBayNew
Availability unknownSold by chuckles092 (100% positive, 4,000 ratings)Returns: Set by the eBay seller; the eBay Money Back Guarantee covers an item that doesn't arrive or isn't as described.
$34.95+ $5.95 shippingVerified
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Price history and every store's price →

From Walmart

Engineered in the USA by Noel Lee and the Monster Design Team for deep bass, clear detail and distortion-free sound
30W True Wireless Stereo pairing: connect two S310 speakers for 60W 360° surround sound
Bluetooth 5.2 for faster connections, wide wireless range and reconnection to the last device
Rechargeable Li-ion battery with up to 24 hours of continuous playback at appropriate volume
IPX6 water resistance against splashes, rain and gentle sprays for outdoor use
Portable outdoor speaker suited to the pool, beach or rainy rides

Returns: Free holiday returns until Jan 31; extended holiday returns available
Shipping: Arrives tomorrow when ordered within 52 min; ships to Sacramento, 95829; sold by MCT Direct, fulfilled by Walmart

Specs

Wireless: Yes
Portable: Yes
Color: Gray
Connectivity: Bluetooth
Max Wattage: 30 W
Battery Life: 32 hr battery life

Ask our shopping agent

About the Monster Superstar S310 Portable Bluetooth Speaker

The Monster Superstar S310 is a portable Bluetooth speaker rated at 30W, with Bluetooth 5.2, IPX6 water resistance and a rechargeable battery. It can pair with a second S310 for True Wireless Stereo and up to 60W of output. Battery claims conflict: the spec sheet says 32 hours, while the Walmart listing says up to 24 hours at appropriate volume. At $29.89 at Walmart as of November 3, 2026, it sits at the only price recorded since October 31, 2026, so there is no cheaper recent low to wait for.

Best forPool, beach and patio use where splashes are likelyBuyers who want loud budget sound and may add a second unit for stereoCasual listeners who value long battery life over hi-fi detail

Pros

30W output is strong for the price
IPX6 resists splashes, rain and gentle sprays
Bluetooth 5.2 with reconnection to the last device
TWS pairing lets two units run as a 60W stereo pair
Long battery life, though the stated figure varies (24 vs 32 hours)

Cons

More deals like this

More from Monster

All Travel Tech Clothes Shoes Jewelry Home Beauty Outdoors Toys

This hour's deals

−63%

Tech · Walmart

Pocket-sized party starter from Monster

Monster Superstar S310 Portable Bluetooth Speaker

A portable Bluetooth speaker that throws sound well beyond its size — great for picnics, patios and dorm rooms.

Deal score 7.0 · Great deal

$29.89$79.99 Walmart's regular price

You save $50.10 at Walmart

Checking it's still available…

Why it's a great deal

Walmart lists its regular price at $79.99: 63% off by its own figures

Visit Walmart

Every store we checked

WalmartNew
In stockSold by MCT Direct
$29.89Observed at 6:32 AM
Visit store
eBayPre-owned
Availability unknownSold by funtimesahead (100% positive, 62 ratings)Returns: Set by the eBay seller; the eBay Money Back Guarantee covers an item that doesn't arrive or isn't as described.
$19.50+ $10.15 shippingVerified
Visit store
eBayNew
Availability unknownSold by chuckles092 (100% positive, 4,000 ratings)Returns: Set by the eBay seller; the eBay Money Back Guarantee covers an item that doesn't arrive or isn't as described.
$34.95+ $5.95 shippingVerified
Visit store

Price history and every store's price →

From Walmart

Engineered in the USA by Noel Lee and the Monster Design Team for deep bass, clear detail and distortion-free sound
30W True Wireless Stereo pairing: connect two S310 speakers for 60W 360° surround sound
Bluetooth 5.2 for faster connections, wide wireless range and reconnection to the last device
Rechargeable Li-ion battery with up to 24 hours of continuous playback at appropriate volume
IPX6 water resistance against splashes, rain and gentle sprays for outdoor use
Portable outdoor speaker suited to the pool, beach or rainy rides

Returns: Free holiday returns until Jan 31; extended holiday returns available
Shipping: Arrives tomorrow when ordered within 52 min; ships to Sacramento, 95829; sold by MCT Direct, fulfilled by Walmart

Specs

Wireless: Yes
Portable: Yes
Color: Gray
Connectivity: Bluetooth
Max Wattage: 30 W
Battery Life: 32 hr battery life

Ask our shopping agent

About the Monster Superstar S310 Portable Bluetooth Speaker

Best forPool, beach and patio use where splashes are likelyBuyers who want loud budget sound and may add a second unit for stereoCasual listeners who value long battery life over hi-fi detail

Pros

30W output is strong for the price
IPX6 resists splashes, rain and gentle sprays
Bluetooth 5.2 with reconnection to the last device
TWS pairing lets two units run as a 60W stereo pair
Long battery life, though the stated figure varies (24 vs 32 hours)

Cons

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What reviewers say

Ratings are mixed at 3.8 out of 5 from 33 ratings, so reception is lukewarm rather than enthusiastic. Buyers of budget Monster speakers typically praise volume and bass for the money while noting build and sound refinement limits.

Pros

Loud output for a small speaker
Bass emphasis suits pop and outdoor listening
Simple Bluetooth pairing

Cons

Sound can sound harsh at high volume
Build feels plasticky
Battery life falls short of the claim in real use

Questions and answers

Is the S310 worth $29.89?: At $29.89 at Walmart as of November 3, 2026, it is a low-cost way to get 30W, IPX6 and Bluetooth 5.2. Expect budget sound quality, not hi-fi. It is a fair buy if loud outdoor audio matters more than refinement.
How long does the battery really last?: The spec sheet says 32 hours, but the Walmart listing says up to 24 hours at appropriate volume. Treat 24 hours as the realistic ceiling and expect less at high volume.
Can I pair two S310 speakers together?: Yes. True Wireless Stereo pairing links two S310 units for up to 60W and a wider stereo image. You need two speakers, sold separately.
Is it waterproof enough for the pool?: It is IPX6, which handles splashes, rain and gentle sprays. Do not submerge it or leave it floating in the pool; for that you need an IPX7-rated speaker.
What comes in the box?: Expect the speaker, a charging cable and basic documentation. A charging adapter and carry case are not typically included at this price.
When is it cheapest?: The only price recorded since October 31, 2026 is $29.89 at Walmart, so there is no lower recent price to wait for. Watch for seasonal sales if you are not in a hurry.