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Monster

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 Home, Outdoor

  • Based on 165 reviews
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Availability: In Stock.
Fulfilled by Amazon
Arrives Sunday, Mar 22
Order within 3 hours and 4 minutes
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Features

  • Pure Monster Sound & 30W Powerful AudioMonster'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 PairingExperience unparalleled connectivity with cutting-edge Bluetooth 6.0, ensuring a stable, high-speed link for smooth, uninterrupted audio streaming from your phone, tablet, or computer. With True Wireless Stereo (TWS) pairing, connect two speakers for a powerful 60W stereo soundstage. No more delays or interruptionsjust premium wireless audio performance.
  • 10H Playtime & IPX6 Water ResistantEnjoy nonstop music for up to 10 hours on a single charge, keeping the beats going wherever life takes you. Built for active lifestyles, the Monster portable speaker delivers uninterrupted power on every adventure. With its IPX6 splash-proof rating, it laughs off rain, spills, and splashesmaking it the ultimate companion for hiking, camping, beach days, and beyond.
  • Built-in Mic & Hansfree CallingEffortlessly manage callswhether you're in a conference, on the road, or juggling tasksthanks to crystal-clear voice capture that keeps conversations sharp and seamless. Ideal for on-the-go professionals and those who prioritize efficiency, Monsters Bluetooth speaker lets you stay connected without skipping a beat. Embrace hands-free convenience while staying focused on whats important.
  • Multiple Connectivity OptionsBeyond Bluetooth 5.4, the Monster Bluetooth speaker expands your options with AUX, TF card, and USB inputs, offering unmatched flexibility for your music. Whether you love wireless convenience or wired reliability, this speaker adapts to your needs. With multiple ways to connect, your favorite tracks are always within reachwherever you go. Discover true audio freedom today!

Brand: Monster


Speaker Maximum Output Power: 30 Watts


Connectivity Technology: Auxiliary, Bluetooth, Wi-Fi


Audio Output Mode: Stereo


Mounting Type: Tabletop Mount


Material: Plastic


Model Name: Monster Shock Plus


Speaker Type: Outdoor


Special Feature: Bass Boost, Built In Microphone, Lightweight, Portable, Waterproof


Recommended Uses For Product: For Computers, 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 Ounce


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: 2.99"D x 10.08"W x 4.02"H


Item Weight: 0.7 Kilograms


Is Waterproof: True


Warranty Type: Limited


Number of Items: 1


Control Method: App, Touch


Wireless Communication Technology: Bluetooth, Wi-Fi


Speaker Size: 3.5 Millimeters


Power Source: Battery Powered


Water Resistance Level: Water Resistant


Customer Package Type: Standard Packaging


Number of Batteries: 1 12V batteries required. (included)


Audio Driver Type: Dynamic Driver


Bluetooth Range: 33 Feet


Subwoofer Connectivity Technology: Wireless


Specific Uses For Product: Business, Home Theatre, Travel


Chassis Size: Ported


Style: Portable Speaker-Black


Bluetooth Version: 6.0


Indoor/Outdoor Usage: Indoor, Outdoor


Manufacturer: Monster


Shape: rectangular prism


Item Weight: 1.54 pounds


Item model number: Monster S21


Batteries: 1 12V batteries required. (included)


Date First Available: March 10, 2025


Charging Time: 2 Hours


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Sunday, Mar 22

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.

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

Learn more about financing & leasing here.

Similar Products

Top Amazon Reviews

    • Great Sound, Solid Build, Worth the Price!
Style: Portable Speaker-Black
I’ve been using this Monster Shock Plus Bluetooth Speaker for a few weeks now, and I’m very impressed. The sound is loud and clear with strong bass, perfect for both indoor and outdoor use. Battery life is excellent — it easily lasts me the whole day without needing a recharge. The build quality feels sturdy and durable, and the waterproof feature gives me peace of mind when I take it outside. Pairing with my phone was super quick and stable, and I love the option to connect via AUX or Bluetooth. For the price, this speaker delivers amazing value. Highly recommend it to anyone looking for a portable speaker with powerful performance! ... show more
Reviewed in the United States on September 29, 2025 by Frank Zheng
    • Great portable bluetooth speaker for the price.
Style: Portable Speaker-Black
Review Image by P.A. P.A.
Review Image by P.A. P.A.
Review Image by P.A. P.A.
Review Image by P.A. P.A.
This portable bluetooth speaker is pretty loud for its size. Pairing was very easy and paired instantly. Very easy to use with big buttons on top. I had music playing on medium volume in the background while doing some cleaning and had no issues and was able to play for over hour and half. Battery life seems to be good but haven’t tested to see how long it’ll last. I can’t complain for the price, I think it is definitely worth the value. I am happy with this purchase. ... show more
Reviewed in the United States on October 13, 2025 by P.A. P.A.
    • Adequate for price range, but not great
Style: Portable Speaker-Black
Sound quality is okay but not great for a speaker in this price range. It sounds a lot better when equalization is configured at the playback device, but detail and clarity is somewhat lacking and the baseline frequency response is weighted for bass and mid frequencies. Full disclosure, I am an audio recording engineer and have relatively high expectations. ... show more
Reviewed in the United States on October 29, 2025 by KV
    • Definitely recommend it
Style: Portable Speaker-Black
It’s very nice and powerful. I use on my boat and it blasts it! Charge lasted more than 8 hours and the best part is it doesn’t get affected by the water. Very functional and useful. Easy to connect with Bluetooth and amazed with the sound quality
Reviewed in the United States on November 1, 2025 by Jason
    • If flat soda was a sound this speaker would be it
Style: Portable Speaker-Black
What a disappointing speaker. It gets loud and it’s clear but there’s no depth to the sound. Completely lacking any bass. For the size of this thing I had much higher expectations. My Anker Soundcore 2 (recently deceased after several years of use) was almost half the size, had a more robust build, and while not quite as loud had better sound quality than this speaker. ... show more
Reviewed in the United States on October 19, 2025 by Brian Long
    • Excellent Sound, Great Value
Style: Portable Speaker-Black
Sound quality is crystal clear with good bass. Volume is loud enough to fill a room. Bluetooth connects quickly and does not drop. Battery backup is impressive, lasts many hours on one charge. Build feels strong and design looks stylish. Only thing is weight is slightly heavy, but that also makes it feel premium. Overall, great speaker for the price. ... show more
Reviewed in the United States on August 22, 2025 by Aravind Muvva
    • Good for a beat up speaker
Style: Portable Speaker-Black
Battery life is horrible. When it’s says battery low. You have 2 seconds to plug it in. It will last half of the day and then needs charging. Sound quality is comparable to a cheap BT speaker. Bass isn’t good. Highs are sharp but not followed with continued good sound. Has a hard time staying clear and crisp with increased volume. Sadly, I would pick a different speaker. ... show more
Reviewed in the United States on August 18, 2025 by Amazon Customer
    • Battery life was poor at best
Style: Portable Speaker-Black
Battery lasted 30-35 minutes on a full charge. I have only used it 2x and I generally liked the sound quality but the peak loudness isn't quite there for being a 30w speaker unit. The bass is good, treble is clear, and the speaker does have dynamic sound. Unfortunately mine doesn't seem to have the battery life as advertised. Update: August 5th, 2025 Right side of the speaker unit failed...Started out with a small rattle and completely failed no output from the right hand side speaker unit. I will be returning this product and possibly never buying this brand again. ... show more
Reviewed in the United States on July 14, 2025 by Angelia and Chien

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