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Monster Shock Plus Bluetooth Speaker, Portable Speaker with 30W Loud Stereo Sound, Bluetooth 6.0, TWS Pairing, 15H Playtime, Support AUX/TF Card, IPX6 Waterproof Wireless Speakers for Outdoor, Home

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$129.99 Why this price?
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Availability: In Stock.
Fulfilled by Amazon

Arrives Friday, May 15
Order within 18 hours and 47 minutes
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Features

  • Pure Monster Sound & 30W Powerful Audio Monster's unique pure sound technology, from over 40 years of sound engineering, is fine-tuned to deliver the most impactful music experience possible. Delivering a whopping 30W of powerful audio, Monster Bluetooth speaker ensures crystal-clear highs, deep bass, and a rich, immersive sound experience. Whether you're listening to music, watching movies, or gaming, every note and detail will come to life, perfect for both indoor and outdoor use.
  • Bluetooth 6.0 & TWS Pairing Stay connected like never before with the advanced Bluetooth 6.0 technology. Offering a stable and fast connection, you can enjoy seamless audio streaming from your smartphone, tablet, or laptop. The True Wireless Stereo pairing allows you to connect two wireless speakers for a 60W synchronized, stereo sound experience. Say goodbye to lag and dropouts and hello to a superior wireless audio experience.
  • 15H Playtime & IPX6 Water Resistant Keep the music going all day long with an impressive 15-hour playtime on a single charge. Designed for the on-the-go lifestyle, the Monster portable speaker ensures you never run out of power during your adventures. Additionally, the IPX6 water-resistant rating means it can withstand splashes, rain, and even accidental spills, making it perfect for outdoor activities like hiking, camping, or beach trips.
  • Built-in Mic & Hansfree Calling Whether you're in a meeting, driving, or simply multitasking, you can make and receive calls with ease. The clear voice pickup of the loud speaker ensures that the conversations are crisp and uninterrupted. Perfect for busy professionals and anyone who values convenience, Monster's portable Bluetooth speaker allows you to stay in touch without missing a beat. Enjoy the freedom of hands-free communication while keeping your focus on what matters most.
  • Multiple Connectivity Options In addition to Bluetooth 6.0, the Monster Bluetooth speaker supports AUX, TF card, and USB connections, giving you the flexibility to play music from various sources. Whether you prefer wireless streaming or wired connections, this device has you covered. The multiple connectivity options ensure that you can enjoy your favorite tunes anytime, anywhere. Experience the ultimate in audio versatility today!

Brand: Monster


Speaker Maximum Output Power: 60 Watts


Connectivity Technology: Auxiliary, Bluetooth, USB, Wi-Fi


Audio Output Mode: Stereo


Mounting Type: Floor Standing


Material: Plastic


Model Name: Monster Shock Plus S21


Speaker Type: Outdoor


Special Feature: Bass Boost, Portable, Stereo Pairing, USB Port, Waterproof


Recommended Uses For Product: For Computers, For DVD Players, For Gaming Consoles, For Music Players, For Smartphones or Tablets, For Surround Sound Systems, For Televisions


Compatible Devices: Compatible with any Bluetooth-enabled device, such as computers, smartphones or tablets, MP3 Player, TV, Laptop


Unit Count: 1.0 Count


Surround Sound Channel Configuration: 2.0


Color: Black


Included Components: 1x AUX IN Cable, 1x Lifting rope, 1x Monster Bluetooth Speaker, 1x Quick Start Guide&Warning Card, 1x USB-C Charging Cable


Product Dimensions: 2.9"D x 8.6"W x 3.5"H


Item Weight: 0.7 Kilograms


Is Waterproof: True


Warranty Type: Limited


Maximum Range: 33 Feet


Number of Items: 1


Control Method: Push Button


Wireless Communication Technology: Bluetooth, Wi-Fi


Power Source: Battery Powered


Water Resistance Level: Water Resistant


Customer Package Type: Standard Packaging


Number of Batteries: 1 A batteries required. (included)


Audio Driver Type: Dynamic Driver


Bluetooth Range: 33 Feet


Audio Driver Size: 40 Millimeters


Subwoofer Connectivity Technology: Wireless


Specific Uses For Product: Home Theatre, Party, Travel


Chassis Size: Ported


Style: S21 Monster Speaker-Black


Bluetooth Version: 6.0


Indoor/Outdoor Usage: Indoor, Outdoor


Manufacturer: Monster


Shape: Rectangular


Item Weight: 1.54 pounds


Item model number: Monster S21


Batteries: 1 A batteries required. (included)


Date First Available: March 10, 2025


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Friday, May 15

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

  • Klarna Financing
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  • Financing through Apple Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Top Amazon Reviews


  • Amazing sound and the perfect everyday speaker
This Monster Shock Plus Bluetooth speaker really surprised me. The sound is powerful and clear, with deep bass for its compact size. The Bluetooth connection was quick and very stable, even while moving around the house. The battery lasts a long time and easily handles several hours of use. I also like that it’s water-resistant, so I don’t worry about splashes. It feels solid, well built, and easy to use. I use it daily for music, podcasts, and videos, and it always performs great. Definitely an excellent purchase. ... show more
Reviewed in the United States on January 5, 2026 by Jhonatan R. Jhonatan R.

  • Good Sound
Works great easy to pair.
Reviewed in the United States on January 1, 2026 by Scott Wolf

  • uses mocro sd card
Sounds good. Not an audiophile but sounds good to me. Price was right. Picked this unit because is has micro sd slot so I don't have to fuss with Bluetooth.
Reviewed in the United States on December 31, 2025 by CB

  • Recomendado
Le dura bastante la carga y suena muy bien
Reviewed in the United States on January 6, 2026 by Duvan

  • Monster speaker going
So far for the price and quality are great long battery life
Reviewed in the United States on January 3, 2026 by Tyler

  • Nice product
Easy to connect. Full speaker sound with great bass. Filled the room with impressive sound especially given its small size. Easy to travel with. Has loop for hook. Multiple inputs in the back like aux as well as Bluetooth functionality. I like that the Bluetooth name to connect to is simple. Perfect for home or travel. Highly recommend! ... show more
Reviewed in the United States on December 13, 2025 by Bob

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