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Two wireless karaoke microphones with built-in speakers, light-up mesh grilles, and control buttons

The Singing Machine Co., Inc.

The Singing Machine Co., Inc. SMM478 Duet Karaoke Microphones

SKU CH-3WYE-Y2A6H MPN SMM478

A pair of portable Bluetooth microphones with built-in speakers that link for duets, offer echo and volume controls, sync lights to your singing and run over four hours per charge

  • Measurements3.2 in W × 3.2 in L × 10 in H
  • Package contentsModel SMM478 – Set of two Micro USB charging cable
  • Product typeMicrophone
  • Product weight1.13 lb (0.51 kg)
  • Pair two microphones for instant duet performances
  • Lights pulse in time with your singing for visual flair
  • Adjustable echo and volume let you shape your vocal sound
  • Rechargeable battery delivers over 4 hours of continuous use
  • Line-in jack connects any external audio source for backing tracks

Duet karaoke pair

The Singing Machine SMM478 supplies two wireless microphones that each contain a built-in speaker so no external PA is required. They connect by Bluetooth and can also accept a wired source through the line-in jack. The set is aimed at casual singers who want a grab-and-go duet solution.

Bluetooth range and battery limits

Wireless pairing works only within standard Bluetooth distance, so the microphones must stay near the source device. Each unit runs on a Li-ion cell that delivers over four hours of continuous use before a recharge is needed. The line-in jack provides a fallback when Bluetooth is unavailable or the battery is flat.

Two microphones in one box

The package contains exactly two matched microphones and a single micro-USB charging cable. Buyers who need more than two voices or a dedicated charger for each unit will have to purchase additional hardware separately.

How it compares

Measured against everything we stock in Studio, Stage & Lavalier Microphones, at today’s prices. Recalculated every night.

Price $35.99
Cheaper than about 65% of the 638 comparable items (median $58.99).

Specifications

Product
Brand nameSinging Machine
Product lineKaraoke Microphones
Model nameSMM478
Part numberSMM478
Product typeMicrophone
Size & build
Measurements3.2 in W × 3.2 in L × 10 in H
Product weight1.13 lb (0.51 kg)
Shipping weight0.74 kg
Package size380 × 78 × 41 mm
In the box
Package contentsModel SMM478 – Set of two
Micro USB charging cable

Questions about this item

What does the SMM478 duet pack include?

The package contains two SMM478 microphones and a Micro USB charging cable so both units can be powered up and used together right away.

How long does the rechargeable battery last during a karaoke session?

The built-in Li-ion battery provides over four hours of continuous singing with lights and echo effects active on a full charge.

How do I connect an external music source to the microphone speaker?

Use the line-in jack on the microphone to plug in a phone, tablet or other audio device and play backing tracks through the built-in speaker.

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