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Rectangular blue speaker with dual 4-inch woofers and front grille

QFX BT-402 Portable Bluetooth Speaker 4" Dual Woofer

SKU CH-DXJ2-VBKXK

Portable Bluetooth speaker with dual 4-inch woofers, rechargeable battery, FM radio, TF card and USB playback

  • Control methodWired
  • Setup requirementsBluetooth
  • Product typeWired
  • Product colorBlack
  • Key featuresBluetooth,Portable,Rechargeable Battery
  • Bluetooth V5.3 for stable wireless audio
  • Dual 4-inch woofers deliver heavy bass
  • TWS function pairs two speakers for wider sound
  • Rechargeable battery enables portable playback
  • Multiple inputs: BT, FM, TF card, USB

QFX BT-402 Portable Bluetooth Speaker

The QFX BT-402 is a portable Bluetooth speaker built for users who want a self-contained sound system for parties, outdoor gatherings or casual home listening. It integrates dual 4-inch woofers and a rechargeable battery so it can operate away from mains power. The speaker also supports FM radio, TF card and USB playback for music without a phone.

ABS enclosure with carry handle and TWS pairing

The speaker housing is made from ABS plastic and shaped as a single portable unit with dual 4-inch drivers mounted side by side. A built-in handle makes it easy to move between rooms or take outside. True Wireless Stereo (TWS) allows two BT-402 units to pair together for a wider stereo image. Controls and the Type-C charging port are accessible on the rear panel.

Microphone, remote and Type-C cable included

A wired microphone plugs into the speaker for karaoke or announcements, and a credit-card-style remote controls volume, track selection and mode switching from across the room. The box also contains a Type-C charging cable for the internal battery and an English instruction manual. No additional software or app is required to use any of these functions.

How it compares

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

Price $28.99
Cheaper than about 68% of the 838 comparable items (median $40.99).

Specifications

Product
Brand nameLogitech
Product lineBOOMS BOX3-RGB
Product typeWired
Product colorBlack
More details
Control methodWired

Questions about this item

What does Bluetooth V5.3 actually limit in daily use?

Bluetooth V5.3 caps the practical wireless range to under 10 metres and handles the BT, FM, TF card, USB and TWS functions.

What space and power does the unit need to sit and run?

The speaker measures 4 inches by two woofers, runs on a built-in DC5V 1A battery and charges via the included TYPE-C cable.

How do I pair two speakers for TWS and what step do people miss?

Power both units on, press the TWS button on one speaker to link them, then connect your phone to the single QFX BT-402 name that appears.

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