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Pair of compact black USB-powered desktop speakers, rectangular cabinets with front grilles and a single volume knob

ottosing H21 2.0 USB Speaker 180 W Black 3.2×6.9×3.7 in

SKU CH-4K40-S12PJ

USB-powered 2.0 stereo speakers deliver 180 W total power with a 150 Hz–20 kHz range and 88 dB signal-to-noise ratio

  • TypeSurround Sound
  • ColorBlack
  • Connector TypeUSB
  • Total Power180 watts
  • Satellite RMS Power /ea180 watts
  • Frequency Response16 KHz
  • Full-range stereo sound from 2.0 channel drivers
  • USB powered plug-and-play with no extra adapter needed
  • One-knob volume control for quick level changes
  • 47 inch cable between speakers for flexible desk placement
  • 180 W total power with 88 dB signal-to-noise ratio

Product identity

The ottosing H21 is a 2.0 channel USB-powered speaker pair rated at 180 watts total power. It connects through USB for power and a 3.5 mm auxiliary jack for audio, measuring 3.2 by 6.9 by 3.7 inches and weighing 0.712 kilograms.

Who this suits

Buyers who want a compact desktop set with a single volume knob and plug-and-play simplicity for Windows, Mac OS, Chrome OS or Linux will find it convenient. Users who need wireless streaming, a dedicated subwoofer or higher fidelity than the 150 Hz to 20 kHz range should look elsewhere.

Installation notes

Connect the USB cable to a 5 V port, plug the 3.5 mm jack into the audio output and use the integrated knob to adjust volume from minimum to maximum. The 47 inch inter-speaker cable allows flexible placement, though the fixed length may limit very wide monitor setups.

Highlights

  • Full-range stereo sound from 2.0 channel drivers
  • USB powered plug-and-play with no extra adapter needed
  • One-knob volume control for quick level changes
  • 47 inch cable between speakers for flexible desk placement
  • 180 W total power with 88 dB signal-to-noise ratio

Specifications

Brandottosing
Model2-Way Speaker Black Pair Wall Speaker
Part NumberH21
TypeSurround Sound
ColorBlack
Connector TypeUSB
Total Power180 watts
Satellite RMS Power /ea180 watts
Frequency Response16 KHz
Dimension3.2 in x 6.9 in x 3.7 in
Weight0.712 kilograms
Package ContentsQuick Start Guide

Questions about this item

Does the speaker set draw power only from a USB port or does it also need a wall outlet?

It is USB-powered at 5 V so a single USB port on the computer or a standard USB charger supplies all the power it needs.

Can I keep my older laptop that only has a 3.5 mm headphone jack and still use these speakers?

Yes, the 3.5 mm aux input connects directly to any device with a headphone jack regardless of operating system or age.

What should I listen for to confirm the 2.0 channel stereo is working correctly after I plug everything in?

Play a stereo test track and verify that left and right channels come from separate speakers with clear separation and the volume knob adjusts output smoothly from minimum to maximum.

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