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Pair of black rectangular desktop speakers with USB cable and volume knob

ottosing H21 2.0 USB Speaker 180 W Black

SKU CH-Y7CD-SQJ97

USB-powered 2.0 stereo speakers deliver 180 W total power with a 3.5 mm aux input for desktop, laptop, tablet or phone

  • Channel configuration2.0
  • Connection typeUSB
  • Total wattage180 W
  • RMS power per satellite180 W
  • Driver unitDynamic driver
  • Frequency range75 Hz
  • Full-range stereo sound from a 2.0 channel configuration
  • 180 watts total power for immersive audio
  • USB-powered plug-and-play with 3.5 mm auxiliary input
  • Touch remote and single-knob volume control
  • Compact 3.2 x 6.9 x 3.7 in design weighing .68 kg

USB-Powered 2.0 Speaker System

The ottosing H21 is a 2.0 channel speaker pair powered entirely by a 5 V USB connection and delivering a rated 180 W total output. Two satellite units connect through a 3.5 mm audio jack, making the set suitable for desktop PCs, laptops, tablets and smartphones that provide both ports. Touch-sensitive controls on the speaker handle power and volume without extra software.

Users Wanting Simple Stereo Without Extra Hardware

Buyers who need a compact stereo upgrade that draws power from an existing USB port will find the H21 convenient. The 1.2 metre inter-speaker cable allows flexible placement on either side of a monitor. Users who require a dedicated subwoofer channel, wireless streaming or a self-amplified system with higher low-frequency extension should consider other form factors.

180 W Total Power Rating

The headline specification is the 180 W combined power figure, which defines the maximum loudness the pair can reach. Frequency response is quoted at 75 Hz, indicating the practical bass limit of the drivers. Match this output level and bass floor to the intended listening distance and content type before purchase.

How it compares

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

Price $33.99
Cheaper than about 59% of the 838 comparable items (median $40.99).

Specifications

Product
Brand nameOttosing
Model name2-Way Speaker Black Pair Wall Speaker
Product typeSurround Sound
Audio & video
Channel configuration2.0
RMS power per satellite180 W
Driver unitDynamic driver
Frequency range75 Hz
Ports & slots
Connection typeUSB
Power
Total wattage180 W
Power supply5 V
Size & build
Measurements3.2 in × 6.9 in × 3.7 in
Product weight0.68 kg
In the box
In the boxQuick Start Guide
More details
Control methodTouch

Questions about this item

Is the 180 W rating continuous or peak output?

The 180 W figure is the total power rating; each satellite is listed at 180 W RMS, which indicates a continuous power specification rather than a peak value.

What real-world volume level does 180 W deliver for desktop use?

At 180 W total power with a 75 Hz low-frequency response, the system produces room-filling sound suitable for gaming, movies and music at typical desktop listening distances.

How does the USB power and 3.5 mm audio connection affect compatibility?

The speaker draws 5 V from a USB port for power while using a 3.5 mm jack for audio, so it works with any device that provides both a USB-A port and a headphone output — desktops, laptops, tablets or phones with a USB-C to USB-A adapter.

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