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Compact black rectangular portable speaker with fabric grille and rubberised edges

Monster Shock Plus S21 portable speaker 40W Bluetooth 6.0 20H IPX6 Deep Black

SKU CH-MF0X-WRYBZ

A portable Bluetooth 6.0 speaker delivering 40 W stereo sound, IPX6 water resistance, 20-hour playtime and TWS pairing for 80 W output

  • Product nameMonster Protable Bluetooth Speaker Shock Plus S21
  • Connection optionsBluetooth
  • Speaker categoryOutdoor
  • Input sourcesBluetooth
  • Operating distance33 ft (10.1 m)
  • Speaker setup2.0
  • 40 W output drives clear highs and deep bass
  • Bluetooth 6.0 gives a stable link up to 33 feet
  • TWS pairing joins two units for 80 W stereo
  • 20-hour battery lasts through long outdoor sessions
  • IPX6 rating resists splashes, rain and spills

Monster Shock Plus S21 40W Speaker

The Monster Shock Plus S21 is a portable Bluetooth speaker built for indoor and outdoor use. It delivers 40 watts of total power through a 2.0 active speaker configuration. Bluetooth 6.0 connectivity provides a stable link up to 33 feet. The unit weighs 0.7 kilograms and carries an IPX6 water-resistance rating.

Suited for travel and outdoor audio

This speaker suits listeners who want loud stereo sound and long battery life for travel, camping or beach trips. TWS pairing allows two units to combine for an 80W stereo soundstage. Buyers who need multi-room Wi-Fi streaming or voice-assistant integration should look at other products, as this model relies solely on Bluetooth 6.0 for wireless audio.

20-hour playtime on one charge

The single specification that decides fit is the 20-hour playtime rating on a single charge. This duration supports full-day outings without recharging. If your use case demands continuous operation beyond 20 hours away from power, this speaker will not meet that requirement.

How it compares

Measured against everything we stock in Bluetooth & Party Speakers, at today’s prices. Recalculated every night.

Price $53.99
Pricier than about 64% of the 862 comparable items (median $39.99).

Specifications

Product
Brand nameMonster
Model nameMonster Shock Plus S21
Product nameMonster Protable Bluetooth Speaker Shock Plus S21
Product colorDeep Black
Audio & video
Speaker categoryOutdoor
Speaker setup2.0
AmplificationActive
Connectivity
Connection optionsBluetooth
Operating distance33 ft (10.1 m)
Ports & slots
Input sourcesBluetooth
Power
Total wattage40 W
Size & build
Product dimensions1.0 in × 1.0 in × 1.0 in
Product weight0.7 kg

Questions about this item

What does the 40 W rating actually deliver in a room?

The 40 W output drives two active drivers to produce loud stereo sound with clear highs and deep bass for indoor or outdoor listening.

What does Bluetooth 6.0 limit in practice?

Bluetooth 6.0 provides a stable link up to 33 feet and enables TWS pairing so two units combine for an 80 W stereo soundstage.

What mounting options does the 1.0 in cube design need?

At 0.7 kg and 1.0 in on each side, it sits on any flat surface without brackets or mounts.

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